diff --git a/check_process b/check_process
index 2bffd5c..b287317 100644
--- a/check_process
+++ b/check_process
@@ -22,7 +22,7 @@
 		upgrade=1
 		#upgrade=1	from_commit=CommitHash
 		backup_restore=1
-		multi_instance=1
+		multi_instance=0
 		port_already_use=0
 		change_url=1
 ;;; Options
diff --git a/manifest.json b/manifest.json
index 9f36da4..be46e07 100644
--- a/manifest.json
+++ b/manifest.json
@@ -6,7 +6,7 @@
         "en": "Helps designers organize and document participatory workshops.",
         "fr": "Aide les designers a organiser et documenter des ateliers participatifs."
     },
-    "version": "1.0~ynh1",
+    "version": "2.0.0b~ynh1",
     "url": "https://plateau.latelier-des-chercheurs.fr/",
     "upstream": {
         "license": "AGPL-3.0-or-later",
diff --git a/scripts/change_url b/scripts/change_url
index ad08adb..7d05853 100644
--- a/scripts/change_url
+++ b/scripts/change_url
@@ -28,6 +28,7 @@ ynh_script_progression --message="Loading installation settings..."
 
 # Needed for helper "ynh_add_nginx_config"
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
+port=$(ynh_app_setting_get --app=$port --key=port)
 
 #=================================================
 # BACKUP BEFORE CHANGE URL THEN ACTIVE TRAP
diff --git a/scripts/restore b/scripts/restore
index 9b2f80a..da07214 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -43,6 +43,13 @@ test ! -d $final_path \
 
 #=================================================
 # STANDARD RESTORATION STEPS
+#=================================================
+# RESTORE THE NGINX CONFIGURATION
+#=================================================
+ynh_script_progression --message="Restoring the NGINX web server configuration..."
+
+ynh_restore_file --origin_path="/etc/nginx/conf.d/$domain.d/$app.conf"
+
 #=================================================
 # RECREATE THE DEDICATED USER
 #=================================================
@@ -90,13 +97,14 @@ chown -R $app:www-data "$datadir"
 #=================================================
 # SPECIFIC RESTORATION
 #=================================================
-
 #=================================================
-# RESTORE THE NGINX CONFIGURATION
+# REINSTALL DEPENDENCIES
 #=================================================
-ynh_script_progression --message="Restoring the NGINX web server configuration..."
+ynh_script_progression --message="Reinstalling dependencies..." --weight=7
 
-ynh_restore_file --origin_path="/etc/nginx/conf.d/$domain.d/$app.conf"
+# Define and install dependencies
+ynh_exec_warn_less ynh_install_nodejs --nodejs_version=$nodejs_version
+ynh_use_nodejs
 
 #=================================================
 # RESTORE VARIOUS FILES
@@ -104,6 +112,7 @@ ynh_restore_file --origin_path="/etc/nginx/conf.d/$domain.d/$app.conf"
 ynh_script_progression --message="Restoring various files..."
 
 ynh_add_config --template="../conf/settings_base.json" --destination="$final_path/settings_base.json"
+chmod 600 "$final_path/settings_base.json"
 
 #=================================================
 # RESTORE SYSTEMD
diff --git a/scripts/upgrade b/scripts/upgrade
index fdc852a..55dfc94 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=$app --key=final_path)
+port=$(ynh_app_setting_get --app=$port --key=port)
 
 #=================================================
 # CHECK VERSION
@@ -88,16 +89,6 @@ if ynh_legacy_permissions_exists; then
 	ynh_app_setting_delete --app=$app --key=is_public
 fi
 
-if ! ynh_permission_exists --permission="admin"; then
-	# Create the required permissions
-	ynh_permission_create --permission="admin" --url="/admin" --allowed=$admin
-fi
-
-# Create a permission if needed
-if ! ynh_permission_exists --permission="api"; then
-	ynh_permission_create --permission="api" --url="/api" --allowed="visitors" --show_tile="false" --protected="true"
-fi
-
 #=================================================
 # CREATE DEDICATED USER
 #=================================================