I think the file you found is the right one, just delete it like you read and don't worry about your settings; it's just the way that features of limewire act according to what you set or what most people choose. If you didn't go in tools, options and changed things in there you don't have to worry about it. If you did you'll remember what you changed

you just have to do it again but limewire migth now work(or your problem will be solved whatever it was originly(forgive my crappy spelling, but you can read it right.....))