If I were you I'd cancel immediately. Get in contact with your credit co./bank ASAP & emphasise you were scammed. Which site did you get it from; Known Scam Sites (click on link) On page 1 of that link you can see the official link to LW Pro. On the last pages you'll see lots of advice. You probably only got LW Basic which is FREE, not the Pro version.

You can find out by going to the LW menu & click the Limewire icon & see About LW which should say Limewire Pro. If there's no Pro mentioned then you don't have LW pro!