Hello, Rebalancer glad to see you back.
I have released another update for the game today.
but could you please describe what happened that causes the save file to disappear?, it should not be deleted when updating the game.
But i have to make sure, the game actually save itself on the browser's Local storage, meaning that if you opened the game in a different browser/computer, you will not find your save file. and if you cleared your browser's cash/data, it will wipe out your save file too.