diff --git a/CHANGELOG.md b/CHANGELOG.md
index e5209043..9b315ae4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - #441: Added time format selection
 - #452: Provide more information when errors occur during the installation. 
 
+## Changed
+
+- #494: French translation corrections/improvements.
+
 ## Fixed
 
 - #433: Selected date when editing an appointment
@@ -24,6 +28,11 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - #455: French Spelling
 - #459: Aggregate Appointment API crashes when a break was added
 - #461: Invalid working plan parsing for foreign languages on day view of the default calendar view.
+- #475: Booking page date selection is broken with any_provider option selected.
+- #483: In backend, calendar for providers become unselectable if switched to calendar for service.
+- #491: Replace hardcoded string with translation in appointment details email template.
+- #495: Database migration fixes (from 1.2.1 to 1.3.x).
+- #497: Backend settings are not being displayed on page load when the user is not an admin. 
 
 ## [1.3.0]
 
diff --git a/src/application/controllers/Appointments.php b/src/application/controllers/Appointments.php
index 76f0ce6f..2fffbf9f 100755
--- a/src/application/controllers/Appointments.php
+++ b/src/application/controllers/Appointments.php
@@ -615,48 +615,9 @@ class Appointments extends CI_Controller {
                 ? [$_REQUEST['appointment_id']]
                 : [];
 
-            // Handle the "Any Provider" case.
-            if ($provider_id === ANY_PROVIDER)
-            {
-                $provider_id = $this->_search_any_provider($service_id, $selected_date_string);
+            $provider_list = ($provider_id === ANY_PROVIDER) ? $this->_search_providers_by_service($service_id) : [$provider_id] ;
 
-                if ($provider_id === null) {
-                    $current_date = new DateTime($selected_date_string);
-                    $current_date->add(new DateInterval('P1D'));
-
-                    do
-                    {
-                        $provider_id = $this->_search_any_provider($service_id, $current_date->format('Y-m-d H:i:s'));
-
-                        if ($provider_id)
-                        {
-                            break;
-                        }
-
-                        $current_date->add(new DateInterval('P1D'));
-                    } while ((int)$current_date->format('d') <= $number_of_days_in_month);
-                }
-
-                if ($provider_id === NULL)
-                {
-                    // No provider is available in the selected date.
-                    for ($i = 1; $i <= $number_of_days_in_month; $i++)
-                    {
-                        $current_date = new DateTime($selected_date->format('Y-m') . '-' . $i);
-                        $unavailable_dates[] = $current_date->format('Y-m-d');
-                    }
-
-                    $this->output
-                        ->set_content_type('application/json')
-                        ->set_output(json_encode($unavailable_dates));
-
-                    return;
-                }
-            }
-
-            // Get the provider record.
             $this->load->model('providers_model');
-            $provider = $this->providers_model->get_row($provider_id);
 
             // Get the service record.
             $this->load->model('services_model');
@@ -673,19 +634,29 @@ class Appointments extends CI_Controller {
                     continue;
                 }
 
-                $empty_periods = $this->_get_provider_available_time_periods($provider_id,
-                    $service_id,
-                    $current_date->format('Y-m-d'), $exclude_appointments);
-
-                $available_hours = $this->_calculate_available_hours($empty_periods, $current_date->format('Y-m-d'),
-                    $service['duration'], $manage_mode, $service['availabilities_type']);
-
-                if ($service['attendants_number'] > 1)
+                // Finding at least one slot of availablity
+                foreach ($provider_list as $curr_provider_id)
                 {
-                    $available_hours = $this->_get_multiple_attendants_hours($current_date->format('Y-m-d'), $service,
-                        $provider);
+                    // Get the provider record.
+                    $curr_provider = $this->providers_model->get_row($curr_provider_id);
+                    
+                    $empty_periods = $this->_get_provider_available_time_periods($curr_provider_id,
+                        $service_id,
+                        $current_date->format('Y-m-d'), $exclude_appointments);
+
+                    $available_hours = $this->_calculate_available_hours($empty_periods, $current_date->format('Y-m-d'),
+                        $service['duration'], $manage_mode, $service['availabilities_type']);
+                    if (! empty($available_hours)) break;
+                    
+                    if ($service['attendants_number'] > 1)
+                    {
+                        $available_hours = $this->_get_multiple_attendants_hours($current_date->format('Y-m-d'), $service,
+                            $curr_provider);
+                        if (! empty($available_hours)) break;
+                    }
                 }
 
+                // No availability amongst all the provider
                 if (empty($available_hours))
                 {
                     $unavailable_dates[] = $current_date->format('Y-m-d');
@@ -1016,7 +987,7 @@ class Appointments extends CI_Controller {
 
                     if ($service['attendants_number'] > 1)
                     {
-                        $available_hours = $this->_get_multiple_attendants_hours($this->input->post('selected_date'), $service,
+                        $available_hours = $this->_get_multiple_attendants_hours($selected_date, $service,
                             $provider);
                     }
 
@@ -1032,6 +1003,36 @@ class Appointments extends CI_Controller {
         return $provider_id;
     }
 
+    /**
+     * Search for any provider that can handle the requested service.
+     *
+     * This method will return the database ID of the providers affected to the requested service.
+     *
+     * @param numeric $service_id The requested service ID.
+     *
+     * @return array Returns the ID of the provider that can provide the requested service.
+     */
+    protected function _search_providers_by_service($service_id)
+    {
+        $this->load->model('providers_model');
+        $available_providers = $this->providers_model->get_available_providers();
+        $provider_list = array();
+
+        foreach ($available_providers as $provider)
+        {
+            foreach ($provider['services'] as $provider_service_id)
+            {
+                if ($provider_service_id === $service_id)
+                {
+                    // Check if the provider is affected to the selected service.
+                    $provider_list[] = $provider['id'];
+                }
+            }
+        }
+
+        return $provider_list;
+    }
+
     /**
      * Calculate the available appointment hours.
      *
diff --git a/src/application/language/french/translations_lang.php b/src/application/language/french/translations_lang.php
index e01e9da0..3b908a97 100755
--- a/src/application/language/french/translations_lang.php
+++ b/src/application/language/french/translations_lang.php
@@ -56,7 +56,7 @@ $lang['appointment_not_found'] = 'Rendez-vous introuvable !';
 $lang['appointment_does_not_exist_in_db'] = 'Le rendez-vous demandé n\'existe plus dans la base de données système.';
 $lang['display_calendar'] = 'Afficher le calendrier.';
 $lang['calendar'] = 'Calendrier';
-$lang['users'] = 'Utilisateur';
+$lang['users'] = 'Utilisateurs';
 $lang['settings'] = 'Paramètres';
 $lang['log_out'] = 'Déconnexion';
 $lang['synchronize'] = 'Synchronisation';
@@ -251,7 +251,7 @@ $lang['december'] = 'Décembre';
 $lang['previous'] = 'Précédent'; // @TODO check -e form
 $lang['next'] = 'Suivant'; // @TODO check -e form
 $lang['now'] = 'Maintenant';
-$lang['select_time'] = 'Choisir l\'heure';
+$lang['select_time'] = 'Choisir l\'Heure';
 $lang['time'] = 'Heure du RDV'; // @TODO to check ;  was 'Temps'
 $lang['hour'] = 'Heure';
 $lang['minute'] = 'Minute';
@@ -272,11 +272,11 @@ $lang['customer_notifications'] = 'Notifications aux clients';
 $lang['customer_notifications_hint'] = 'Définit si les clients reçoivent des notifications par email chaque fois qu\'il y a un changement d\'horaire de l\'un de leurs rendez-vous.';
 $lang['date_format'] = 'Format des Dates';
 $lang['date_format_hint'] = 'Change le format d\'affichage des dates (D - Jour, M - Mois, Y - Année).';
-$lang['time_format'] = 'Time Format';
-$lang['time_format_hint'] = 'Change the time display format (H - Hours, M - Minutes).';
+$lang['time_format'] = 'Format de l\'Heure';
+$lang['time_format_hint'] = 'Change le format d\'affichage de l\'Heure (H - Heures, M - Minutes).';
 $lang['google_analytics_code_hint'] = 'Renseignez l\'ID Google Analytics à utiliser dans la page des réservations.';
-$lang['availabilities_type'] = 'Availabilities Type';
+$lang['availabilities_type'] = 'Type de disponibilités';
 $lang['flexible'] = 'Flexible';
-$lang['fixed'] = 'Fixed';
-$lang['attendants_number'] = 'Attendants Number';
-$lang['reset_working_plan'] = 'Reset the working plan back to the default values.';
+$lang['fixed'] = 'Fixe';
+$lang['attendants_number'] = 'Nombre de participants';
+$lang['reset_working_plan'] = 'Restaurer les valeurs d\'origine du planning de travail.';
diff --git a/src/application/migrations/009_change_column_types.php b/src/application/migrations/009_change_column_types.php
index 1110d838..185a40ef 100644
--- a/src/application/migrations/009_change_column_types.php
+++ b/src/application/migrations/009_change_column_types.php
@@ -198,61 +198,44 @@ class Migration_Change_column_types extends CI_Migration {
 
         // Add table constraints again.
         $this->db->query('ALTER TABLE `ea_appointments`
-            ADD CONSTRAINT `ea_appointments_ea_users_customer` FOREIGN KEY (`id_users_customer`) REFERENCES `ea_users` (`id`)
-            ON DELETE CASCADE
-            ON UPDATE CASCADE,
-            ADD CONSTRAINT `ea_appointments_ea_services` FOREIGN KEY (`id_services`) REFERENCES `ea_services` (`id`)
-            ON DELETE CASCADE
-            ON UPDATE CASCADE,
-            ADD CONSTRAINT `ea_appointments_ea_users_provider` FOREIGN KEY (`id_users_provider`) REFERENCES `ea_users` (`id`)
-            ON DELETE CASCADE
-            ON UPDATE CASCADE');
+            ADD CONSTRAINT `ea_appointments_ibfk_2` FOREIGN KEY (`id_users_customer`) REFERENCES `ea_users` (`id`) ON DELETE CASCADE ON UPDATE CASCADE,
+            ADD CONSTRAINT `ea_appointments_ibfk_3` FOREIGN KEY (`id_services`) REFERENCES `ea_services` (`id`) ON DELETE CASCADE ON UPDATE CASCADE,
+            ADD CONSTRAINT `ea_appointments_ibfk_4` FOREIGN KEY (`id_users_provider`) REFERENCES `ea_users` (`id`) ON DELETE CASCADE ON UPDATE CASCADE');
 
         $this->db->query('ALTER TABLE `ea_secretaries_providers`
-            ADD CONSTRAINT `ea_secretaries_ea_users_secretary` FOREIGN KEY (`id_users_secretary`) REFERENCES `ea_users` (`id`)
-            ON DELETE CASCADE
-            ON UPDATE CASCADE,
-            ADD CONSTRAINT `ea_secretaries_ea_users_provider` FOREIGN KEY (`id_users_provider`) REFERENCES `ea_users` (`id`)
-            ON DELETE CASCADE
-            ON UPDATE CASCADE');
+            ADD CONSTRAINT `fk_ea_secretaries_providers_1` FOREIGN KEY (`id_users_secretary`) REFERENCES `ea_users` (`id`) ON DELETE CASCADE ON UPDATE CASCADE,
+            ADD CONSTRAINT `fk_ea_secretaries_providers_2` FOREIGN KEY (`id_users_provider`) REFERENCES `ea_users` (`id`) ON DELETE CASCADE ON UPDATE CASCADE');
 
         $this->db->query('ALTER TABLE `ea_services`
-            ADD CONSTRAINT `ea_services_ea_service_categories` FOREIGN KEY (`id_service_categories`) REFERENCES `ea_service_categories` (`id`)
-            ON DELETE SET NULL
-            ON UPDATE CASCADE');
+            ADD CONSTRAINT `ea_services_ibfk_1` FOREIGN KEY (`id_service_categories`) REFERENCES `ea_service_categories` (`id`) ON DELETE SET NULL ON UPDATE CASCADE');
 
         $this->db->query('ALTER TABLE `ea_services_providers`
-            ADD CONSTRAINT `ea_services_providers_ea_users_provider` FOREIGN KEY (`id_users`) REFERENCES `ea_users` (`id`)
-            ON DELETE CASCADE
-            ON UPDATE CASCADE,
-            ADD CONSTRAINT `ea_services_providers_ea_services` FOREIGN KEY (`id_services`) REFERENCES `ea_services` (`id`)
-            ON DELETE CASCADE
-            ON UPDATE CASCADE');
+            ADD CONSTRAINT `ea_services_providers_ibfk_1` FOREIGN KEY (`id_users`) REFERENCES `ea_users` (`id`) ON DELETE CASCADE ON UPDATE CASCADE,
+            ADD CONSTRAINT `ea_services_providers_ibfk_2` FOREIGN KEY (`id_services`) REFERENCES `ea_services` (`id`) ON DELETE CASCADE ON UPDATE CASCADE');
 
         $this->db->query('ALTER TABLE `ea_users`
-            ADD CONSTRAINT `ea_users_ea_roles` FOREIGN KEY (`id_roles`) REFERENCES `ea_roles` (`id`)
-            ON DELETE CASCADE
-            ON UPDATE CASCADE');
+            ADD CONSTRAINT `ea_users_ibfk_1` FOREIGN KEY (`id_roles`) REFERENCES `ea_roles` (`id`) ON DELETE CASCADE ON UPDATE CASCADE');
 
         $this->db->query('ALTER TABLE `ea_user_settings`
-            ADD CONSTRAINT `ea_user_settings_ea_users` FOREIGN KEY (`id_users`) REFERENCES `ea_users` (`id`)
-            ON DELETE CASCADE
-            ON UPDATE CASCADE');
+            ADD CONSTRAINT `ea_user_settings_ibfk_1` FOREIGN KEY (`id_users`) REFERENCES `ea_users` (`id`) ON DELETE CASCADE ON UPDATE CASCADE');
+
+        // Change charset of ea_secretaries_providers table for databases created with EA! 1.2.1 version
+        $this->db->query('ALTER TABLE ea_secretaries_providers CONVERT TO CHARACTER SET utf8');
     }
 
     public function down()
     {
         // Drop table constraints.
-        $this->db->query('ALTER TABLE ea_appointments DROP FOREIGN KEY ea_appointments_ea_services');
-        $this->db->query('ALTER TABLE ea_appointments DROP FOREIGN KEY ea_appointments_ea_users_customer');
-        $this->db->query('ALTER TABLE ea_appointments DROP FOREIGN KEY ea_appointments_ea_users_provider');
-        $this->db->query('ALTER TABLE ea_secretaries_providers DROP FOREIGN KEY ea_secretaries_ea_users_secretary');
-        $this->db->query('ALTER TABLE ea_secretaries_providers DROP FOREIGN KEY ea_secretaries_ea_users_provider');
-        $this->db->query('ALTER TABLE ea_services_providers DROP FOREIGN KEY ea_services_providers_ea_users_provider');
-        $this->db->query('ALTER TABLE ea_services_providers DROP FOREIGN KEY ea_services_providers_ea_services');
-        $this->db->query('ALTER TABLE ea_services DROP FOREIGN KEY ea_services_ea_service_categories');
-        $this->db->query('ALTER TABLE ea_users DROP FOREIGN KEY ea_users_ea_roles');
-        $this->db->query('ALTER TABLE ea_user_settings DROP FOREIGN KEY ea_user_settings_ea_users');
+        $this->db->query('ALTER TABLE ea_appointments DROP FOREIGN KEY ea_appointments_ibfk_2');
+        $this->db->query('ALTER TABLE ea_appointments DROP FOREIGN KEY ea_appointments_ibfk_3');
+        $this->db->query('ALTER TABLE ea_appointments DROP FOREIGN KEY ea_appointments_ibfk_4');
+        $this->db->query('ALTER TABLE ea_secretaries_providers DROP FOREIGN KEY fk_ea_secretaries_providers_1');
+        $this->db->query('ALTER TABLE ea_secretaries_providers DROP FOREIGN KEY fk_ea_secretaries_providers_2');
+        $this->db->query('ALTER TABLE ea_services_providers DROP FOREIGN KEY ea_services_providers_ibfk_1');
+        $this->db->query('ALTER TABLE ea_services_providers DROP FOREIGN KEY ea_services_providers_ibfk_2');
+        $this->db->query('ALTER TABLE ea_services DROP FOREIGN KEY ea_services_ibfk_1');
+        $this->db->query('ALTER TABLE ea_users DROP FOREIGN KEY ea_users_ibfk_1');
+        $this->db->query('ALTER TABLE ea_user_settings DROP FOREIGN KEY ea_user_settings_ibfk_1');
 
         // Appointments
         $fields = [
diff --git a/src/application/migrations/011_remove_prefix_from_fkey_constraints.php b/src/application/migrations/011_remove_prefix_from_fkey_constraints.php
index 0adc878e..cfbd2805 100644
--- a/src/application/migrations/011_remove_prefix_from_fkey_constraints.php
+++ b/src/application/migrations/011_remove_prefix_from_fkey_constraints.php
@@ -15,16 +15,16 @@ class Migration_Remove_prefix_from_fkey_constraints extends CI_Migration {
     public function up()
     {
         // Drop table constraints.
-        $this->db->query('ALTER TABLE ea_appointments DROP FOREIGN KEY ea_appointments_ea_services');
-        $this->db->query('ALTER TABLE ea_appointments DROP FOREIGN KEY ea_appointments_ea_users_customer');
-        $this->db->query('ALTER TABLE ea_appointments DROP FOREIGN KEY ea_appointments_ea_users_provider');
-        $this->db->query('ALTER TABLE ea_secretaries_providers DROP FOREIGN KEY ea_secretaries_ea_users_secretary');
-        $this->db->query('ALTER TABLE ea_secretaries_providers DROP FOREIGN KEY ea_secretaries_ea_users_provider');
-        $this->db->query('ALTER TABLE ea_services_providers DROP FOREIGN KEY ea_services_providers_ea_users_provider');
-        $this->db->query('ALTER TABLE ea_services_providers DROP FOREIGN KEY ea_services_providers_ea_services');
-        $this->db->query('ALTER TABLE ea_services DROP FOREIGN KEY ea_services_ea_service_categories');
-        $this->db->query('ALTER TABLE ea_users DROP FOREIGN KEY ea_users_ea_roles');
-        $this->db->query('ALTER TABLE ea_user_settings DROP FOREIGN KEY ea_user_settings_ea_users');
+        $this->db->query('ALTER TABLE ea_appointments DROP FOREIGN KEY ea_appointments_ibfk_2');
+        $this->db->query('ALTER TABLE ea_appointments DROP FOREIGN KEY ea_appointments_ibfk_3');
+        $this->db->query('ALTER TABLE ea_appointments DROP FOREIGN KEY ea_appointments_ibfk_4');
+        $this->db->query('ALTER TABLE ea_secretaries_providers DROP FOREIGN KEY fk_ea_secretaries_providers_1');
+        $this->db->query('ALTER TABLE ea_secretaries_providers DROP FOREIGN KEY fk_ea_secretaries_providers_2');
+        $this->db->query('ALTER TABLE ea_services_providers DROP FOREIGN KEY ea_services_providers_ibfk_1');
+        $this->db->query('ALTER TABLE ea_services_providers DROP FOREIGN KEY ea_services_providers_ibfk_2');
+        $this->db->query('ALTER TABLE ea_services DROP FOREIGN KEY ea_services_ibfk_1');
+        $this->db->query('ALTER TABLE ea_users DROP FOREIGN KEY ea_users_ibfk_1');
+        $this->db->query('ALTER TABLE ea_user_settings DROP FOREIGN KEY ea_user_settings_ibfk_1');
 
         // Add table constraints again without the "ea" prefix.
         $this->db->query('ALTER TABLE `ea_appointments`
@@ -86,45 +86,25 @@ class Migration_Remove_prefix_from_fkey_constraints extends CI_Migration {
 
         // Add table constraints again.
         $this->db->query('ALTER TABLE `ea_appointments`
-            ADD CONSTRAINT `ea_appointments_ea_users_customer` FOREIGN KEY (`id_users_customer`) REFERENCES `ea_users` (`id`)
-            ON DELETE CASCADE
-            ON UPDATE CASCADE,
-            ADD CONSTRAINT `ea_appointments_ea_services` FOREIGN KEY (`id_services`) REFERENCES `ea_services` (`id`)
-            ON DELETE CASCADE
-            ON UPDATE CASCADE,
-            ADD CONSTRAINT `ea_appointments_ea_users_provider` FOREIGN KEY (`id_users_provider`) REFERENCES `ea_users` (`id`)
-            ON DELETE CASCADE
-            ON UPDATE CASCADE');
+            ADD CONSTRAINT `ea_appointments_ibfk_2` FOREIGN KEY (`id_users_customer`) REFERENCES `ea_users` (`id`) ON DELETE CASCADE ON UPDATE CASCADE,
+            ADD CONSTRAINT `ea_appointments_ibfk_3` FOREIGN KEY (`id_services`) REFERENCES `ea_services` (`id`) ON DELETE CASCADE ON UPDATE CASCADE,
+            ADD CONSTRAINT `ea_appointments_ibfk_4` FOREIGN KEY (`id_users_provider`) REFERENCES `ea_users` (`id`) ON DELETE CASCADE ON UPDATE CASCADE');
 
         $this->db->query('ALTER TABLE `ea_secretaries_providers`
-            ADD CONSTRAINT `ea_secretaries_ea_users_secretary` FOREIGN KEY (`id_users_secretary`) REFERENCES `ea_users` (`id`)
-            ON DELETE CASCADE
-            ON UPDATE CASCADE,
-            ADD CONSTRAINT `ea_secretaries_ea_users_provider` FOREIGN KEY (`id_users_provider`) REFERENCES `ea_users` (`id`)
-            ON DELETE CASCADE
-            ON UPDATE CASCADE');
+            ADD CONSTRAINT `fk_ea_secretaries_providers_1` FOREIGN KEY (`id_users_secretary`) REFERENCES `ea_users` (`id`) ON DELETE CASCADE ON UPDATE CASCADE,
+            ADD CONSTRAINT `fk_ea_secretaries_providers_2` FOREIGN KEY (`id_users_provider`) REFERENCES `ea_users` (`id`) ON DELETE CASCADE ON UPDATE CASCADE');
 
         $this->db->query('ALTER TABLE `ea_services`
-            ADD CONSTRAINT `ea_services_ea_service_categories` FOREIGN KEY (`id_service_categories`) REFERENCES `ea_service_categories` (`id`)
-            ON DELETE SET NULL
-            ON UPDATE CASCADE');
+            ADD CONSTRAINT `ea_services_ibfk_1` FOREIGN KEY (`id_service_categories`) REFERENCES `ea_service_categories` (`id`) ON DELETE SET NULL ON UPDATE CASCADE');
 
         $this->db->query('ALTER TABLE `ea_services_providers`
-            ADD CONSTRAINT `ea_services_providers_ea_users_provider` FOREIGN KEY (`id_users`) REFERENCES `ea_users` (`id`)
-            ON DELETE CASCADE
-            ON UPDATE CASCADE,
-            ADD CONSTRAINT `ea_services_providers_ea_services` FOREIGN KEY (`id_services`) REFERENCES `ea_services` (`id`)
-            ON DELETE CASCADE
-            ON UPDATE CASCADE');
+            ADD CONSTRAINT `ea_services_providers_ibfk_1` FOREIGN KEY (`id_users`) REFERENCES `ea_users` (`id`) ON DELETE CASCADE ON UPDATE CASCADE,
+            ADD CONSTRAINT `ea_services_providers_ibfk_2` FOREIGN KEY (`id_services`) REFERENCES `ea_services` (`id`) ON DELETE CASCADE ON UPDATE CASCADE');
 
         $this->db->query('ALTER TABLE `ea_users`
-            ADD CONSTRAINT `ea_users_ea_roles` FOREIGN KEY (`id_roles`) REFERENCES `ea_roles` (`id`)
-            ON DELETE CASCADE
-            ON UPDATE CASCADE');
+            ADD CONSTRAINT `ea_users_ibfk_1` FOREIGN KEY (`id_roles`) REFERENCES `ea_roles` (`id`) ON DELETE CASCADE ON UPDATE CASCADE');
 
         $this->db->query('ALTER TABLE `ea_user_settings`
-            ADD CONSTRAINT `ea_user_settings_ea_users` FOREIGN KEY (`id_users`) REFERENCES `ea_users` (`id`)
-            ON DELETE CASCADE
-            ON UPDATE CASCADE');
+            ADD CONSTRAINT `ea_user_settings_ibfk_1` FOREIGN KEY (`id_users`) REFERENCES `ea_users` (`id`) ON DELETE CASCADE ON UPDATE CASCADE');
     }
 }
diff --git a/src/assets/js/backend_calendar_default_view.js b/src/assets/js/backend_calendar_default_view.js
index c1d5ba40..9053b9b6 100755
--- a/src/assets/js/backend_calendar_default_view.js
+++ b/src/assets/js/backend_calendar_default_view.js
@@ -218,6 +218,7 @@ window.BackendCalendarDefaultView = window.BackendCalendarDefaultView || {};
                 $('#calendar').fullCalendar('option', 'editable', false);
             } else {
                 $('#google-sync, #enable-sync, #insert-appointment, #insert-unavailable').prop('disabled', false);
+                $('#calendar').fullCalendar('option', 'selectable', true);
                 $('#calendar').fullCalendar('option', 'editable', true);
 
                 // If the user has already the sync enabled then apply the proper style changes.
@@ -1002,7 +1003,7 @@ window.BackendCalendarDefaultView = window.BackendCalendarDefaultView || {};
                                             allDay: false,
                                             color: '#BEBEBE',
                                             editable: false,
-                                            className: 'fc-unavailable fc-break'
+                                            className: 'fc-unavailable'
                                         };
 
                                         $calendar.fullCalendar('renderEvent', unavailablePeriod, false);
diff --git a/src/assets/js/backend_settings.js b/src/assets/js/backend_settings.js
index 9d8f250a..d66b6c10 100644
--- a/src/assets/js/backend_settings.js
+++ b/src/assets/js/backend_settings.js
@@ -102,8 +102,8 @@ window.BackendSettings = window.BackendSettings || {};
 
         if (bindEventHandlers) {
             _bindEventHandlers();
-            $('#settings-page .nav li').first().addClass('active');
-            $('#settings-page .nav li').first().find('a').trigger('click');
+            var $link = $('#settings-page .nav li').not('.hidden').first().find('a');
+            $link.tab('show');
         }
 
         // Apply Privileges
diff --git a/src/assets/js/backend_users_admins.js b/src/assets/js/backend_users_admins.js
index 8d9f49a0..95ed5967 100644
--- a/src/assets/js/backend_users_admins.js
+++ b/src/assets/js/backend_users_admins.js
@@ -102,8 +102,7 @@
             $('#admins .record-details').find('select').prop('disabled', false);
             $('#admin-password, #admin-password-confirm').removeClass('required');
             $('#admin-notifications').prop('disabled', false);
-
-            $('#filter-admins .filter').prop('disabled', true);
+            $('#filter-admins button').prop('disabled', true);
             $('#filter-admins .results').css('color', '#AAA');
         });
 
diff --git a/src/assets/sql/structure.sql b/src/assets/sql/structure.sql
index dbaab393..78ccf943 100644
--- a/src/assets/sql/structure.sql
+++ b/src/assets/sql/structure.sql
@@ -2,16 +2,16 @@ SET SQL_MODE = "NO_AUTO_VALUE_ON_ZERO";
 SET time_zone = "+00:00";
 
 CREATE TABLE IF NOT EXISTS `ea_appointments` (
-    `id` BIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT,
+    `id` INT(11) NOT NULL AUTO_INCREMENT,
     `book_datetime` DATETIME,
     `start_datetime` DATETIME,
     `end_datetime` DATETIME,
     `notes` TEXT,
     `hash` TEXT,
     `is_unavailable` TINYINT(4) DEFAULT '0',
-    `id_users_provider` BIGINT(20) UNSIGNED,
-    `id_users_customer` BIGINT(20) UNSIGNED,
-    `id_services` BIGINT(20) UNSIGNED,
+    `id_users_provider` INT(11),
+    `id_users_customer` INT(11),
+    `id_services` INT(11),
     `id_google_calendar` TEXT,
     PRIMARY KEY (`id`),
     KEY `id_users_customer` (`id_users_customer`),
@@ -29,15 +29,15 @@ CREATE TABLE `ea_migrations` (
     DEFAULT CHARSET = utf8;
 
 CREATE TABLE IF NOT EXISTS `ea_roles` (
-    `id` BIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT,
+    `id` INT(11) NOT NULL AUTO_INCREMENT,
     `name` VARCHAR(256),
     `slug` VARCHAR(256),
     `is_admin` TINYINT(4),
-    `appointments` INT(4),
-    `customers` INT(4),
-    `services` INT(4),
-    `users` INT(4),
-    `system_settings` INT(4),
+    `appointments` INT(11),
+    `customers` INT(11),
+    `services` INT(11),
+    `users` INT(11),
+    `system_settings` INT(11),
     `user_settings` INT(11),
     PRIMARY KEY (`id`)
 )
@@ -46,8 +46,8 @@ CREATE TABLE IF NOT EXISTS `ea_roles` (
 
 
 CREATE TABLE IF NOT EXISTS `ea_secretaries_providers` (
-    `id_users_secretary` BIGINT(20) UNSIGNED NOT NULL,
-    `id_users_provider` BIGINT(20) UNSIGNED NOT NULL,
+    `id_users_secretary` INT(11) NOT NULL,
+    `id_users_provider` INT(11) NOT NULL,
     PRIMARY KEY (`id_users_secretary`, `id_users_provider`),
     KEY `id_users_secretary` (`id_users_secretary`),
     KEY `id_users_provider` (`id_users_provider`)
@@ -57,7 +57,7 @@ CREATE TABLE IF NOT EXISTS `ea_secretaries_providers` (
 
 
 CREATE TABLE IF NOT EXISTS `ea_services` (
-    `id` BIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT,
+    `id` INT(11) NOT NULL AUTO_INCREMENT,
     `name` VARCHAR(256),
     `duration` INT(11),
     `price` DECIMAL(10, 2),
@@ -65,7 +65,7 @@ CREATE TABLE IF NOT EXISTS `ea_services` (
     `description` TEXT,
     `availabilities_type` VARCHAR(32) DEFAULT 'flexible',
     `attendants_number` INT(11) DEFAULT '1',
-    `id_service_categories` BIGINT(20) UNSIGNED,
+    `id_service_categories` INT(11),
     PRIMARY KEY (`id`),
     KEY `id_service_categories` (`id_service_categories`)
 )
@@ -74,8 +74,8 @@ CREATE TABLE IF NOT EXISTS `ea_services` (
 
 
 CREATE TABLE IF NOT EXISTS `ea_services_providers` (
-    `id_users` BIGINT(20) UNSIGNED NOT NULL,
-    `id_services` BIGINT(20) UNSIGNED NOT NULL,
+    `id_users` INT(11) NOT NULL,
+    `id_services` INT(11) NOT NULL,
     PRIMARY KEY (`id_users`, `id_services`),
     KEY `id_services` (`id_services`)
 )
@@ -84,7 +84,7 @@ CREATE TABLE IF NOT EXISTS `ea_services_providers` (
 
 
 CREATE TABLE IF NOT EXISTS `ea_service_categories` (
-    `id` BIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT,
+    `id` INT(11) NOT NULL AUTO_INCREMENT,
     `name` VARCHAR(256),
     `description` TEXT,
     PRIMARY KEY (`id`)
@@ -94,7 +94,7 @@ CREATE TABLE IF NOT EXISTS `ea_service_categories` (
 
 
 CREATE TABLE IF NOT EXISTS `ea_settings` (
-    `id` BIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT,
+    `id` INT(11) NOT NULL AUTO_INCREMENT,
     `name` VARCHAR(512),
     `value` LONGTEXT,
     PRIMARY KEY (`id`)
@@ -104,7 +104,7 @@ CREATE TABLE IF NOT EXISTS `ea_settings` (
 
 
 CREATE TABLE IF NOT EXISTS `ea_users` (
-    `id` BIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT,
+    `id` INT(11) NOT NULL AUTO_INCREMENT,
     `first_name` VARCHAR(256),
     `last_name` VARCHAR(512),
     `email` VARCHAR(512),
@@ -115,7 +115,7 @@ CREATE TABLE IF NOT EXISTS `ea_users` (
     `state` VARCHAR(128),
     `zip_code` VARCHAR(64),
     `notes` TEXT,
-    `id_roles` BIGINT(20) UNSIGNED NOT NULL,
+    `id_roles` INT(11) NOT NULL,
     PRIMARY KEY (`id`),
     KEY `id_roles` (`id_roles`)
 )
@@ -124,7 +124,7 @@ CREATE TABLE IF NOT EXISTS `ea_users` (
 
 
 CREATE TABLE IF NOT EXISTS `ea_user_settings` (
-    `id_users` BIGINT(20) UNSIGNED NOT NULL,
+    `id_users` INT(11) NOT NULL,
     `username` VARCHAR(256),
     `password` VARCHAR(512),
     `salt` VARCHAR(512),
diff --git a/src/engine/Notifications/Email.php b/src/engine/Notifications/Email.php
index be5263e9..edb1ea3e 100755
--- a/src/engine/Notifications/Email.php
+++ b/src/engine/Notifications/Email.php
@@ -242,7 +242,7 @@ class Email {
             '$appointment_service' => $service['name'],
             '$appointment_provider' => $provider['first_name'] . ' ' . $provider['last_name'],
             '$appointment_date' => date($date_format . ' ' . $timeFormat, strtotime($appointment['start_datetime'])),
-            '$appointment_duration' => $service['duration'] . ' minutes',
+            '$appointment_duration' => $service['duration'] . ' ' . $this->framework->lang->line('minutes'),
             '$company_link' => $company['company_link'],
             '$company_name' => $company['company_name'],
             '$customer_name' => $customer['first_name'] . ' ' . $customer['last_name'],