diff --git a/conf/app.src b/conf/app.src
index ffa1aa4..4070886 100644
--- a/conf/app.src
+++ b/conf/app.src
@@ -3,5 +3,4 @@ SOURCE_SUM=9286971422470cedb8ca5f6675863816bf3f05f0769842a1bdc12f85fc594938
 SOURCE_SUM_PRG=sha256sum
 SOURCE_FORMAT=tar.gz
 SOURCE_IN_SUBDIR=true
-SOURCE_FILENAME=
 SOURCE_EXTRACT=true
diff --git a/manifest.json b/manifest.json
index 69c1730..621c6ca 100644
--- a/manifest.json
+++ b/manifest.json
@@ -6,7 +6,7 @@
     "en": "Decentralized websites using Bitcoin crypto and BitTorrent network",
     "fr": "Sites Web décentralisés utilisant la crypto Bitcoin et le réseau BitTorrent"
   },
-  "version": "2021-01-25~ynh1",
+  "version": "2021.01.25~ynh1",
   "url": "https://zeronet.io",
   "license": "AGPL-3.0",
   "maintainer": {
@@ -14,7 +14,7 @@
     "email": "whypsi@riseup.net"
   },
   "requirements": {
-    "yunohost": ">= 4.1.7.3"
+    "yunohost": ">= 4.3.0"
   },
   "multi_instance": true,
   "services": [
@@ -24,22 +24,12 @@
       "install" : [
         {
           "name": "domain",
-          "type": "domain",
-          "ask": {
-            "en": "Choose a sub domain name for ZeroNet",
-            "fr": "Choisissez un nom de domaine pour ZeroNet"
-          },
-          "example": "zeronet.domain.tld"
+          "type": "domain"
         },
         {
           "name": "password",
           "type": "password",
-          "optional": true,
-          "ask": {
-              "en": "Set the password for the Zeronet.",
-              "fr": "Définissez le mot de passe pour votre Zeronet."
-          },
-          "example": "myreallystrengthpassword"
+          "optional": true
         }
       ]
     }
diff --git a/scripts/backup b/scripts/backup
index e345ceb..9520570 100755
--- a/scripts/backup
+++ b/scripts/backup
@@ -41,6 +41,7 @@ ynh_print_info --message="Declaring files to be backed up..."
 #=================================================
 
 ynh_backup --src_path="$final_path"
+
 #=================================================
 # BACKUP THE NGINX CONFIGURATION
 #=================================================
diff --git a/scripts/install b/scripts/install
index c4f5a04..acb9f1c 100755
--- a/scripts/install
+++ b/scripts/install
@@ -56,7 +56,7 @@ ynh_app_setting_set --app=$app --key=password --value=$password
 #=================================================
 # FIND AND OPEN A PORT
 #=================================================
-ynh_script_progression --message="Configuring firewall..."
+ynh_script_progression --message="Finding an available port..."
 
 # Find an available port
 port=$(ynh_find_port --port=43110)
diff --git a/scripts/remove b/scripts/remove
index d408e37..0146fdd 100755
--- a/scripts/remove
+++ b/scripts/remove
@@ -59,6 +59,17 @@ ynh_script_progression --message="Removing app main directory..."
 # Remove the app directory securely
 ynh_secure_remove --file="$final_path"
 
+#=================================================
+# REMOVE DATA DIR
+#=================================================
+
+# Remove the data directory if --purge option is used
+if [ "${YNH_APP_PURGE:-0}" -eq 1 ]
+then
+	ynh_script_progression --message="Removing app data directory..." --weight=1
+	ynh_secure_remove --file="$datadir"
+fi
+
 #=================================================
 # REMOVE NGINX CONFIGURATION
 #=================================================
diff --git a/scripts/restore b/scripts/restore
index 44dbae2..e043798 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -39,8 +39,6 @@ datadir=$(ynh_app_setting_get --app=$app --key=datadir)
 #=================================================
 ynh_script_progression --message="Validating restoration parameters..."
 
-ynh_webpath_available --domain=$domain --path_url=$path_url \
-	|| ynh_die --message="Path not available: ${domain}${path_url}"
 test ! -d $final_path \
 	|| ynh_die --message="There is already a directory: $final_path "
 
@@ -98,9 +96,10 @@ popd
 ynh_script_progression --message="Restoring various files..."
 
 # Restore permissions on app files
-ynh_restore_file --origin_path="$datadir"
+ynh_restore_file --origin_path="$datadir" --not_mandatory
 
 mkdir -p "$datadir"
+
 chmod 750 "$datadir"
 chmod -R o-rwx "$datadir"
 chown -R $app:$app "$datadir"