I don't have aseprite.ini filein that folder, so I think you're right about the cyrillic name of the user's name. I haven't found the safe way to change it, so the most of the extensions don't work at all.
If you message me on Twitter or via e-mail (kac.wozniak[at]gmail.com) I’ll send you a build that should work while I’m figuring out how to tackle this issue. ✌
