Sorry to say, but it sounds like you were scammed when you originally bought Pro.

Prior to August 2007 Pro cost $18.88 & included free email support & updates for 6 months. So back then, you would've been able to update Pro for free up to 6 months after purchase.

The official site now offers Pro (free email support & updates for 6 months) or Extended Pro (free email support & updates for 12 months).

LimeWireLLC has never offered a 'lifetime membership'. Unfortunately, scammers do offer this kind of thing.

Membership? - **WARNING ** BEWARE** - Download p2p Clients ONLY Thru Official Sites