diff --git a/scripts/restore b/scripts/restore
index 6603226..f66332a 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -18,12 +18,12 @@ ynh_script_progression --message="Restoring the app main directory..." --weight=
 ynh_restore_file --origin_path="$install_dir"
 
 chmod -R o-rwx "$install_dir"
-chown -R $app:www-data "$install_dir"
+chown -R "$app:www-data" "$install_dir"
 
 #=================================================
-# RESTORE THE PHP-FPM CONFIGURATION
+# RESTORE SYSTEM CONFIGURATIONS
 #=================================================
-ynh_script_progression --message="Restoring the PHP-FPM configuration..." --weight=1
+ynh_script_progression --message="Restoring system configurations related to $app..." --weight=1
 
 ynh_restore_file --origin_path="/etc/nginx/conf.d/$domain.d/$app.conf"
 
diff --git a/scripts/upgrade b/scripts/upgrade
index 9520ef9..c0e9955 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -18,46 +18,20 @@ upgrade_type=$(ynh_check_app_version_changed)
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
 #=================================================
+ynh_script_progression --message="Upgrading source files..." --weight=1
 
-if [ "$upgrade_type" == "UPGRADE_APP" ]
-then
-	ynh_script_progression --message="Upgrading source files..." --weight=1
-	
-	# Test because file doesn’t exist at first install. It is created at first page opening.
-	if test -f "$install_dir/inc/digiwords.db"
-	then
-		# Create a temporary directory
-		tmpdir="$(mktemp -d)"
-	
-		# Backup the inc/digiwords.db file to the temp dir
-		cp -ar "$install_dir/inc/digiwords.db" "$tmpdir/digiwords.db"
-		
-		# Download, check integrity, uncompress and patch the source from app.src
-		ynh_setup_source --dest_dir="$install_dir" --full_replace = 1
-	
-		# Copy digiwords.db back to the install_dir
-		cp -ar "$tmpdir/digiwords.db" "$install_dir/inc/digiwords.db"
-
-		# Remove the tmp directory securely
-		ynh_secure_remove --file="$tmpdir"
-	else
-		# Download, check integrity, uncompress and patch the source from app.src
-		ynh_setup_source --dest_dir="$install_dir" --full_replace = 1
-	fi
-fi
+ynh_setup_source --dest_dir="$install_dir" --keep="inc/digiwords.db"
 
 chmod -R o-rwx "$install_dir"
-chown -R $app:www-data "$install_dir"
+chown -R "$app:www-data" "$install_dir"
 
 #=================================================
-# NGINX CONFIGURATION
+# REAPPLY SYSTEM CONFIGURATIONS
 #=================================================
-ynh_script_progression --message="Upgrading NGINX web server configuration..." --weight=1
+ynh_script_progression --message="Upgrading system configurations related to $app..." --weight=1
 
-# Create a dedicated NGINX config
 ynh_add_nginx_config
 
-# Create a dedicated PHP-FPM config
 ynh_add_fpm_config
 
 #=================================================