Sorry but you've been scammed. Pro costs US$18.88 for 6 months worth of upgrades & email support. There's no lifetime membership. The only place to get an official, clean version is www.limewire.com

You can contact your CC company & report this, most have a fraud section to deal with this sort of thing. Even though you paid quite a while ago, you've only just become aware that you were scammed, they might be able to organise some sort of refund for you. It's worth a try

Here's some info to read
http://www.gnutellaforums.com/showth...threadid=28751