Saves Deleted After Installing Expansion Pack

[HighElfSorceress]

So I beat SoA and installed ToB (after much trouble) and I've been playing for a little while. I went to SoA by accident and noticed my saves were missing. That's not a problem for me, but my brother plays on the same computer, and he hasn't beat it yet. I have the saves, actually, so all hope is not lost. They're in AppData, but they don't show up in-game. I'm wondering how to get them to be in-game. I'd appreciate an answer before my brother kills me, thanks in advance!