diff --git a/README.md b/README.md
index d1290cc..24ae748 100644
--- a/README.md
+++ b/README.md
@@ -31,7 +31,6 @@ Backdrop CMS includes an update utility to handle any necessary changes to the d
 ## Documentation
 
  * Official documentation: https://backdropcms.org/user-guide
- * YunoHost documentation: https://yunohost.org/#/app_backdrop
 
 ## YunoHost specific features
 
diff --git a/README_fr.md b/README_fr.md
index 15edb08..46a466c 100644
--- a/README_fr.md
+++ b/README_fr.md
@@ -20,7 +20,7 @@ Backdrop CMS is a simple, lightweight, and easy-to-use Content Management System
 
 ## Démo
 
-* [Démo officielle](https://demo.yunohost.org/ttrss/)
+* [Démo officielle](https://backdropcms.org/demo)
 
 ## Configuration
 
@@ -29,7 +29,6 @@ Backdrop CMS inclus un utilitaire de mise à jour pour gérer toutes les modific
 ## Documentation
 
 * Documentation officielle : https://backdropcms.org/user-guide
-* Documentation YunoHost : https://yunohost.org/#/app_backdrop_fr
 
 ## Caractéristiques spécifiques YunoHost
 
diff --git a/conf/settings.example.php b/conf/settings.example.php
index 1b8d70e..3d03de9 100644
--- a/conf/settings.example.php
+++ b/conf/settings.example.php
@@ -12,8 +12,8 @@
  * advanced database documentation at
  * https://api.backdropcms.org/database-configuration
  */
-$database = 'mysql://__DBNAME__:__DBPWD__@localhost/__DBNAME__';
-$database_prefix = '__DBNAME___';
+$database = 'mysql://__DB_NAME__:__DB_PWD__@localhost/__DB_NAME__';
+$database_prefix = '__DB_NAME___';
 
 /**
  * Site configuration files location.
diff --git a/manifest.json b/manifest.json
index e87eda0..6becb58 100644
--- a/manifest.json
+++ b/manifest.json
@@ -6,7 +6,7 @@
     "en": "Easy-to-use CMS for building professional websites",
     "fr": "CMS facile à utiliser pour créer des sites Web professionnels"
   },
-  "version": "1.18.1~ynh1",
+  "version": "1.18.1~ynh2",
   "url": "https://backdropcms.org/",
   "license": "GPL-2.0",
   "maintainer": {
@@ -14,7 +14,7 @@
     "email": ""
   },
   "requirements": {
-    "yunohost": ">= 4.0.0"
+    "yunohost": ">= 4.1.7"
   },
   "multi_instance": true,
   "services": [
@@ -27,29 +27,17 @@
     {
       "name": "domain",
       "type": "domain",
-      "ask": {
-        "en": "Choose a domain for Backdrop",
-        "fr": "Choisissez un domaine pour Backdrop"
-      },
       "example": "domain.org"
     },
     {
       "name": "path",
       "type": "path",
-      "ask": {
-        "en": "Choose a path for Backdrop",
-        "fr": "Choisissez un chemin pour Backdrop"
-      },
       "example": "/backdrop",
       "default": "/backdrop"
       },
     {
       "name": "is_public",
       "type": "boolean",
-      "ask": {
-        "en": "Is it a public site?",
-        "fr": "Est-ce un site public ?"
-    },
       "help": {
         "en": "If enabled, Backdrop will be accessible by people who do not have an account. This can be changed later via the webadmin.",
         "fr": "Si cette case est cochée, Backdrop sera accessible aux personnes n’ayant pas de compte. Vous pourrez changer ceci plus tard via la webadmin."
diff --git a/scripts/change_url b/scripts/change_url
index 16fc4d1..d13d717 100644
--- a/scripts/change_url
+++ b/scripts/change_url
@@ -8,6 +8,7 @@
 
 source _common.sh
 source /usr/share/yunohost/helpers
+ynh_abort_if_errors
 
 #=================================================
 # RETRIEVE ARGUMENTS
diff --git a/scripts/install b/scripts/install
index b2f7d08..c73facc 100644
--- a/scripts/install
+++ b/scripts/install
@@ -43,7 +43,6 @@ ynh_script_progression --message="Storing installation settings..." --weight=1
 
 ynh_app_setting_set --app=$app --key=domain --value=$domain
 ynh_app_setting_set --app=$app --key=path --value=$path_url
-ynh_app_setting_set --app=$app --key=is_public --value=$is_public
 
 #=================================================
 # STANDARD MODIFICATIONS
@@ -55,7 +54,6 @@ ynh_script_progression --message="Creating a MySQL database..." --weight=2
 db_name=$(ynh_sanitize_dbid $app)
 ynh_app_setting_set --app=$app --key=db_name --value=$db_name
 ynh_mysql_setup_db --db_user=$db_name --db_name=$db_name
-db_pwd=$(ynh_app_setting_get --app=$app --key=mysqlpwd)
 
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
@@ -101,10 +99,9 @@ ynh_script_progression --message="Configuring Backdrop..." --weight=1
 cp ../conf/settings.example.php "$final_path/settings.php"
 
 # Change variables in ttrss configuration
-ynh_replace_string --match_string="__DBNAME__" --replace_string="$db_name" --target_file="$final_path/settings.php"
-ynh_replace_string --match_string="__DBPWD__" --replace_string="$db_pwd" --target_file="$final_path/settings.php"
+ynh_replace_string --match_string="__DB_NAME__" --replace_string="$db_name" --target_file="$final_path/settings.php"
+ynh_replace_string --match_string="__DB_PWD__" --replace_string="$db_pwd" --target_file="$final_path/settings.php"
 ynh_replace_string --match_string="__SALT__" --replace_string="$(ynh_string_random --length=30)" --target_file="$final_path/settings.php"
-#ynh_replace_string --match_string="__DOMAIN__" --replace_string="https://$domain$path_url" --target_file="$final_path/config.php"
 
 # Recalculate and store the config file checksum into the app settings
 ynh_store_file_checksum --file="$final_path/settings.php"
@@ -121,7 +118,7 @@ chmod -R 770 $final_path/files
 #=================================================
 # SETUP SSOWAT
 #=================================================
-ynh_script_progression --message="Configuring SSOwat..." --weight=1
+ynh_script_progression --message="Configuring permissions..." --weight=1
 
 # Make app public if necessary or protect it
 if [ $is_public -eq 1 ]
diff --git a/scripts/upgrade b/scripts/upgrade
index 9694d55..7fc3a0f 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -19,7 +19,6 @@ app=$YNH_APP_INSTANCE_NAME
 domain=$(ynh_app_setting_get --app=$app --key=domain)
 path_url=$(ynh_app_setting_get --app=$app --key=path)
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
-is_public=$(ynh_app_setting_get --app=$app --key=is_public)
 db_name=$(ynh_app_setting_get --app=$app --key=db_name)
 db_pwd=$(ynh_app_setting_get --app=$app --key=mysqlpwd)
 phpversion=$(ynh_app_setting_get --app=$app --key=phpversion)
@@ -47,6 +46,13 @@ if [ -z "$db_name" ]; then
 	ynh_app_setting_set --app=$app --key=db_name --value=$db_name
 fi
 
+# Cleaning legacy permissions
+if ynh_legacy_permissions_exists; then
+	ynh_legacy_permissions_delete_all
+
+	ynh_app_setting_delete --app=$app --key=is_public
+fi
+
 #=================================================
 # BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
 #=================================================