it updates itself because it keeps all your data in the regedit directory, which means even if you delete the game, your data is still on your computer meaning if you redownload the game or get a newer version, all your data is saved, also 2.0 is broken for both patreon and public users so they released 2.1 to patreon without arcade mode since the arcade mode is busted and would crash any time you finished a niight or died.