Hi. Sorry been super busy. I think this is ANOTHER copy protection layer that's surfaced since moving to the unified hard disk image. The files are exactly the same as in v1, byte for byte. I must get back into it asap and resolve this issue as soon as I have some breathing room. But it's urgent. Also I'm thinking of making it multiplatform, with a party editor.
Let me know if you need me right now to manually modify your party.