You can't undo it the same way you did it? Have you tried "wine regedit" from terminal and trying to put it back with the GUI WINE registry editor? You have an old WINE, and you should probably update it, but that's a separate thing. If it gets really bad, you can save what you want to keep, delete the .wine folder from your home folder, make a new .wine folder, and let WINE repopulate it from scratch. Cheers, Jake