First of all, did you buy LW Pro (basic is free) for $18.88 USD from www.limewire.com?

If you have bought the official version from the official site, check the link below for info. Send a PM to limenathan & he should be able to sort things out for you.
Problems getting your LimeWire Pro after payment or other Pro payment issues etc

If you bought from a scam site, post back & we'll be able to give you some more info about possibly getting your money back.