Hmmm...maybe you got LW from that site? It's definitely not the real thing, I just had a look at it.
If you
did get LW from here, it's still dodgy. Even though you didn't pay for it. Because LW is open source, it means that scammers can doctor it (add spyware etc). This is the reason that people are always told to only get it from the official site.
If you want to upgrade, please do it from limewire.com...then you won't have spy/adware problems. You don't have to buy Pro, you can get the latest free basic version & try it out.