Sorry, but you were scammed.

The only official site for downloading either version of LW is Lime Wire » Download LimeWire
As you can see, there's no 'lifetime' or 'unlimited' access. The maximum period for downloading LW updates is 12 months.

If you pay a scam site for LW, your email address won't ever be in the official database & so you'll never be able to download Pro from the official site.

The official site offers Pro ($21.95, free updates & email support for 6 months) or Extended Pro ($34.95, free updates & email support for 12 months).LimeWireLLC will appear on your CC statement if you've bought from the official site. Membership? - **WARNING ** BEWARE** - Download p2p Clients ONLY Thru Official Sites

You can download the free basic LW from the download link above