Pro is a 'one time purchase' but if you want tech support from the official site, you need to have bought your Pro from the official site Lime Wire » Official Website & Free Download, BitTorrent « (shows on your CC statement as payment to LimeWire LLC) & still be within the timeframe of your purchase. If you bought 6 months worth of Pro then it must be less that 6 months since you paid. There's recently been a 12 month deal introduced as well.

How long ago did you buy Pro & who did you pay?
6 months worth of Pro costs $21.95 & 12 months worth costs $34.95...if you paid $40 a while ago then it sounds like you bought from a scam site. In that case your email address wouldn't be in the official database.