The best way to update the game is to download it via Steam. That will auto-update it while it's installed.
You should be able to see your Steam key from https://itch.io/docs/buying/already-bought
The best way to update the game is to download it via Steam. That will auto-update it while it's installed.
You should be able to see your Steam key from https://itch.io/docs/buying/already-bought