Stop your server, then click file manager on the control panel
- Browse to the /Saved/ directory and rename or delete the current game.db file
- Find the database that you want to restore to, e.g. game_backup_1.db then rename that to game.db
- Finally, delete the game.db-shm file and game.db-wal files
Now when you start up your server the map will be restored back to a previous version.