I'm afraid you are being taken for a ride, but not by Limewire. The only thing Limewire is trying to get you do is to update from the Basic version which as you know is free and is what you have "purchased"... to their pro version, which all basic users have to put up with. Limewire has nothing to do with the money you have paid and does not see a penny or a cent of it.
The folloing link will take you to an enormous thread which catalogues just some of the scams that have been inflicted on people.
http://www.gnutellaforums.com/showth...threadid=28751