Uninstalled the beta viewer (dunno which version) and mesh project viewer. My main viewer's settings seemed to have gotten reset after, as it required username/password again, changed graphics, and critically has no menu and no means to open menus (Ctrl+P doesn't work, etc). Tried uninstalling, restarting, deleting the Second Life directory and reinstalling, and the situation's the same. However, it still saved my login info through that. So I'm guessing it's caching my settings somewhere else. So: How can I make sure I wipe out every setting Viewer 2 is storing for me?