Re: 奴隷との生活 -Teaching Feeling-
The game runs entirely locally, that is, it is self-contained within its own directory. I'm honestly not sure what would be in appdata as the game has no installer and does not write to any directory outside of its own. All I can think is that somehow the trial and the full version were extracted to the same directory or some other strangeness.
The trial is based on an older build of the game similar to 1.16, when folders for character images were all numerals. As of 1.22 this scheme changed to be useful names instead, and very recently (1.4.0 IIRC) even the game's scenario files have been separated into folders by function.
So, as long as the full version is extracted to its own folder and given permission to write to said folder, everything should work fine. There should be no reason to rename any folders, and having to do so reminds me of the transition to 1.22...which makes me think that somehow the trial and full version got jumbled up on your machine.
Regardless, I'm glad you got it working in the end even if I still don't understand exactly what happened to break it in the first place. Enjoy the headpats!