If mods are involved, these can potentially do all kinds of weird stuff if they're not properly coded, you can't blame TFP if a mod messes with the original file index and creates data here and there, and these remains then tangle up even a seemingly fresh install.
But this is not the case here, as i edited in my previous post (see zztongs latest edit)
It just seems the game doesn't want to do this: 🙂
