Who did you pay for LW & how much did you pay? The official site now has a 1 year Pro deal, but I'm pretty sure it wasn't around in July (I could be wrong).
If you bought Pro from the official site Lime Wire » Official Website & Free Download, BitTorrent « & paid $34.95 (payment to LimewireLLC), go to this page & enter the email address that you used to buy Pro.
Lime Wire » LimeWire PRO Lookup