gabe said she fixed this with a more recent version, by I think not allowing you to do the events to get the beastgirl (gin, I think, or whatever her name, hadn't played for awhile) yet at this point in the game, but you do have her, is this from playing an earlier version?
I had the same issue, myself, unfortunately, I don't think there's anything you can do about it (except maybe being able to go into the code like with your saved game), unless you got a save file from before you got gin/beastgirl (you can still do the events but have to do the "good path" in releasing her, if that's okay for your playthrough, and not taking her as a sl'v3 with the "evil path", if I remember right), otherwise, you just got to start over... such fun...