diff --git a/README.md b/README.md
index 6aa255a..682af44 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,7 @@ Vikunja is a self-hosted open-source to-do list application for all platforms.
 - CalDAV
 - Links  
 
-**Shipped version:** 0.18.2~ynh2
+**Shipped version:** 0.18.2~ynh3
 
 **Demo:** https://try.vikunja.io/login
 
diff --git a/README_fr.md b/README_fr.md
index fe6e45c..82c383d 100644
--- a/README_fr.md
+++ b/README_fr.md
@@ -26,7 +26,7 @@ Vikunja est une application de liste de tâches Open Source auto-hébergée pour
 - CalDAV
 - Links  
 
-**Version incluse :** 0.18.2~ynh2
+**Version incluse :** 0.18.2~ynh3
 
 **Démo :** https://try.vikunja.io/login
 
diff --git a/conf/systemd.service b/conf/systemd.service
index adf2e25..8d1a42d 100644
--- a/conf/systemd.service
+++ b/conf/systemd.service
@@ -7,7 +7,7 @@ Requires=postgresql.service redis.service
 Type=simple
 User=__APP__
 Group=__APP__
-WorkingDirectory=/opt/__APP__
+WorkingDirectory=/opt/__APP__/
 ExecStart=/opt/__APP__/vikunja
 RestartSec=2s
 Restart=always
diff --git a/config_panel.toml b/config_panel.toml
index ae8fec3..f6887f3 100644
--- a/config_panel.toml
+++ b/config_panel.toml
@@ -11,7 +11,7 @@ services = ["__APP__"]
         ask = "Set MOTD"
         type = "string"
         help = "Set the MOTD message shown in Vikunja login page"
-        bind = "motd:/etc/vikunja/config.yml"
+        bind = "motd:/opt/__APP__/config.yml"
 
         [main.config.enable_registration]
         ask = "Enable registration"
@@ -19,5 +19,5 @@ services = ["__APP__"]
         yes = "true"
         no = "false"
         help = "Whether to let new users registering themselves or not"
-        bind = "enableregistration:/etc/vikunja/config.yml"
+        bind = "enableregistration:/opt/__APP__/config.yml"
 
diff --git a/manifest.json b/manifest.json
index b0d1b4c..ad084a5 100644
--- a/manifest.json
+++ b/manifest.json
@@ -6,7 +6,7 @@
         "en": "Self-hosted To-Do list application",
         "fr": "Application de liste de tâches auto-hébergée"
     },
-    "version": "0.18.2~ynh2",
+    "version": "0.18.2~ynh3",
     "url": "https://vikunja.io/",
     "upstream": {
         "license": "GPL-3.0",
diff --git a/scripts/backup b/scripts/backup
index 146898e..f8b20e9 100644
--- a/scripts/backup
+++ b/scripts/backup
@@ -24,6 +24,7 @@ ynh_print_info --message="Loading installation settings..."
 app=$YNH_APP_INSTANCE_NAME
 
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
+backend_path=$(ynh_app_setting_get --app=$app --key=backend_path)
 domain=$(ynh_app_setting_get --app=$app --key=domain)
 db_name=$(ynh_app_setting_get --app=$app --key=db_name)
 
@@ -39,11 +40,8 @@ ynh_print_info --message="Declaring files to be backed up..."
 # Frontend
 ynh_backup --src_path="$final_path"
 
-# Config
-ynh_backup --src_path="/etc/$app/config.yml"
-
 # Backend
-ynh_backup --src_path="/opt/$app"
+ynh_backup --src_path="$backend_path"
 
 #=================================================
 # BACKUP THE NGINX CONFIGURATION
diff --git a/scripts/change_url b/scripts/change_url
index 4fefeca..9216339 100644
--- a/scripts/change_url
+++ b/scripts/change_url
@@ -28,6 +28,7 @@ ynh_script_progression --message="Loading installation settings..." --weight=1
 
 # Needed for helper "ynh_add_nginx_config"
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
+backend_path=$(ynh_app_setting_get --app=$app --key=backend_path)
 port=$(ynh_app_setting_get --app=$app --key=port)
 db_name=$(ynh_app_setting_get --app=$app --key=db_name)
 db_user=$db_name
@@ -117,9 +118,9 @@ ynh_script_progression --message="Adding a configuration file..." --weight=1
 domain="$new_domain"
 path="$new_path"
 redis_db=$(ynh_redis_get_free_db)
-ynh_add_config --template="../conf/config.yml" --destination="/etc/$app/config.yml"
+ynh_add_config --template="../conf/config.yml" --destination="$backend_path/config.yml"
 
-chmod 600 "/etc/$app/config.yml"
+chmod 600 "$backend_path/config.yml"
 
 #=================================================
 # GENERIC FINALISATION
diff --git a/scripts/install b/scripts/install
index 0acd0ea..6cce381 100644
--- a/scripts/install
+++ b/scripts/install
@@ -37,6 +37,7 @@ enable_registration="true"
 ynh_script_progression --message="Validating installation parameters..." --weight=1
 
 final_path=/var/www/$app
+backend_path=/opt/$app
 test ! -e "$final_path" || ynh_die --message="This path already contains a folder"
 
 # Register (book) web path
@@ -107,16 +108,18 @@ chown -R $app:www-data "$final_path"
 #=================================================
 ynh_script_progression --message="Setting up backend..." --weight=1
 
+ynh_app_setting_set --app=$app --key=backend_path --value=$backend_path
+
 # Download, check integrity, uncompress and patch the source from app.src
-mkdir -p "/opt/$app"
-mkdir -p "/opt/$app/files"
+mkdir -p "$backend_path"
+mkdir -p "$backend_path/files"
 tempdir="$(mktemp -d)"
 ynh_setup_source --dest_dir=$tempdir --source_id=$YNH_ARCH
 back="$(find $tempdir -name "vikunja-*" \! -name "*.sha256")"
-cp "$back" "/opt/$app/vikunja"
+cp "$back" "$backend_path/vikunja"
 
-chmod +x "/opt/$app/vikunja"
-chown -R $app:www-data "/opt/$app/files"
+chmod +x "$backend_path/vikunja"
+chown -R $app:www-data "$backend_path/files"
 
 #=================================================
 # NGINX CONFIGURATION
@@ -131,12 +134,11 @@ ynh_add_nginx_config
 #=================================================
 ynh_script_progression --message="Adding a configuration file..." --weight=1
 
-mkdir -p "/etc/$app"
 redis_db=$(ynh_redis_get_free_db)
-ynh_add_config --template="../conf/config.yml" --destination="/etc/$app/config.yml"
+ynh_add_config --template="../conf/config.yml" --destination="$backend_path/config.yml"
 
-chmod 400 "/etc/$app/config.yml"
-chown $app:$app "/etc/$app/config.yml"
+chmod 400 "$backend_path/config.yml"
+chown $app:$app "$backend_path/config.yml"
 
 #=================================================
 # SETUP SYSTEMD
diff --git a/scripts/remove b/scripts/remove
index 049da87..4c7d338 100644
--- a/scripts/remove
+++ b/scripts/remove
@@ -19,6 +19,7 @@ app=$YNH_APP_INSTANCE_NAME
 domain=$(ynh_app_setting_get --app=$app --key=domain)
 port=$(ynh_app_setting_get --app=$app --key=port)
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
+backend_path=$(ynh_app_setting_get --app=$app --key=backend_path)
 db_name=$(ynh_app_setting_get --app=$app --key=db_name)
 db_user=$db_name
 
@@ -74,6 +75,9 @@ ynh_script_progression --message="Removing $app main directory..." --weight=6
 # Remove the app directory securely
 ynh_secure_remove --file="$final_path"
 
+# Remove backend
+ynh_secure_remove --file="$backend_path"
+
 #=================================================
 # REMOVE NGINX CONFIGURATION
 #=================================================
@@ -92,14 +96,6 @@ ynh_script_progression --message="Removing the dedicated system user..." --weigh
 # Delete a system user
 ynh_system_user_delete --username=$app
 
-#=================================================
-# REMOVE BACKEND
-#=================================================
-ynh_script_progression --message="Removing backend..." --weight=1
-
-# Delete /opt/vikunja
-ynh_secure_remove --file="/opt/$app"
-
 #=================================================
 # END OF SCRIPT
 #=================================================
diff --git a/scripts/restore b/scripts/restore
index 5c14c96..f1ba73f 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -26,6 +26,7 @@ app=$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)
+backend_path=$(ynh_app_setting_get --app=$app --key=backend_path)
 db_name=$(ynh_app_setting_get --app=$app --key=db_name)
 db_user=$db_name
 db_pwd=$(ynh_app_setting_get --app=$app --key=psqlpwd)
@@ -65,13 +66,10 @@ chmod 750 "$final_path"
 chmod -R o-rwx "$final_path"
 chown -R $app:www-data "$final_path"
 
-# Config
-ynh_restore_file --origin_path="/etc/$app/config.yml"
-
 # Backend
-ynh_restore_file --origin_path="/opt/$app"
-chmod +x "/opt/$app/vikunja"
-chown -R $app:www-data "/opt/$app/files"
+ynh_restore_file --origin_path="$backend_path"
+chmod +x "$backend_path/vikunja"
+chown -R $app:www-data "$backend_path/files"
 
 #=================================================
 # REINSTALL DEPENDENCIES
diff --git a/scripts/upgrade b/scripts/upgrade
index cde8496..a31f1bf 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -19,6 +19,7 @@ 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=$app --key=final_path)
+backend_path=$(ynh_app_setting_get --app=$app --key=backend_path)
 port=$(ynh_app_setting_get --app=$app --key=port)
 db_name=$(ynh_app_setting_get --app=$app --key=db_name)
 db_user=$db_name
@@ -35,11 +36,31 @@ enable_registration=$(ynh_app_setting_get --app=$app --key=enable_registration)
 
 upgrade_type=$(ynh_check_app_version_changed)
 
+#=================================================
+# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
+#=================================================
+ynh_script_progression --message="Backing up $app before upgrading (may take a while)..." --weight=4
+
+# Backup the current version of the app
+ynh_backup_before_upgrade
+ynh_clean_setup () {
+	# restore it if the upgrade fails
+	ynh_restore_upgradebackup
+}
+# Exit if an error occurs during the execution of the script
+ynh_abort_if_errors
+
 #=================================================
 # ENSURE DOWNWARD COMPATIBILITY
 #=================================================
 ynh_script_progression --message="Ensuring downward compatibility..." --weight=1
 
+# If backend_path doesn't exist, create it
+if [ -z "$backend_path" ]; then
+	backend_path=/opt/$app
+	ynh_app_setting_set --app=$app --key=backend_path --value=$backend_path
+fi
+
 if [ -z "$set_motd" ]; then
 	set_motd=""
 	ynh_app_setting_set --app=$app --key=set_motd --value=$set_motd
@@ -62,20 +83,6 @@ if ! ynh_permission_exists --permission="api"; then
 	ynh_permission_create --permission="api" --url="/api" --allowed="visitors" --auth_header="false" --show_tile="false" --protected="true"
 fi
 
-#=================================================
-# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
-#=================================================
-ynh_script_progression --message="Backing up $app before upgrading (may take a while)..." --weight=4
-
-# Backup the current version of the app
-ynh_backup_before_upgrade
-ynh_clean_setup () {
-	# restore it if the upgrade fails
-	ynh_restore_upgradebackup
-}
-# Exit if an error occurs during the execution of the script
-ynh_abort_if_errors
-
 #=================================================
 # STANDARD UPGRADE STEPS
 #=================================================
@@ -103,21 +110,21 @@ then
 
 	# Download, check integrity, uncompress and patch the source from app.src
 	# Frontend
-	ynh_setup_source --dest_dir="$final_path" --source_id="front" --keep="/etc/$app/config.yml"
+	ynh_setup_source --dest_dir="$final_path" --source_id="front"
 	
 	# Backend
-	mkdir -p "/opt/$app/files"
+	mkdir -p "$backend_path/files"
 	tempdir="$(mktemp -d)"
 	ynh_setup_source --dest_dir=$tempdir --source_id=$YNH_ARCH
 	back="$(find $tempdir -name "vikunja-*" \! -name "*.sha256")"
-	cp "$back" "/opt/$app/vikunja"
+	cp "$back" "$backend_path/vikunja"
 fi
 
 chmod 750 "$final_path"
 chmod -R o-rwx "$final_path"
 chown -R $app:www-data "$final_path"
-chmod +x "/opt/$app/vikunja"
-chown -R $app:www-data "/opt/$app/files"
+chmod +x "$backend_path/vikunja"
+chown -R $app:www-data "$backend_path/files"
 
 #=================================================
 # NGINX CONFIGURATION