Ah okay, if you're on Mac then you probably need to move the newly downloaded version of the game to your applications folder, or edit it's permissions so it has read/write permissions. This link can help with read/write permissions. https://support.apple.com/en-ca/guide/mac-help/mchlp1203/mac That's probably why the old one works and the new one doesn't. (Side note, if you are applying patch 0.37.12 to a base game prior to 0.37 when you mention patching it, that will almost certainly cause errors.) The other thing you'll need to do is apply the "old save compatibility patch" to your game. That should solve the first error you posted. (If you get to the fifth dungeon, you'll also want to enable compatibility mode with the debugger, if that gives you a bug you'll want to apply patch 0.37.13.)