Yeah, you have been done by a scam site, limewire is free for basic and $18.88us for the pro and you can only get the geniune software from http://limewire.com
I would contact your cc company and tell them of this scam and try to get your money back that way.....
Also get rid of the limewire you have as it could be full of spyware and download the free LW from the link I gave you.....