Let me make it simple:

If LimeWire sold you the Pro, then the email address you used at that time will relookup your Pro page. I just checked: it works.

If someone else sold you something that you thought was LW's Pro, there's no Pro page at LimeWire to lookup.

The link to other people's stories details what they tried to get their money back (or not).

btw, this site is just a bunch of users helping other users. You're welcome for the time it took me to dig up those links for you. Best wishes getting your problems resolved.