I guess you mean that your email address isn't being recognised by LW?

Where did you buy LW from? Who's the vendor on your CC statement?

The only official site for downloading LW Pro or basic is Lime Wire » Download LimeWire

Pro costs $21.95 for 6 months of updates & email support, $34.95 for 12 months of updates & support & sometimes there's a special offer of Pro for $13.95 with no updates or support included.

Your email address will only be recognised in the official database while your Pro's current- if you bought Pro for 6 months, your email address stays in the database for 6 months, if you bought Pro for a year then your email address stays in the database for a year. After that, your email address is removed from the database & you can't download free updates any more.

If you paid a scam site for Pro then you won't ever be able to update from the official site.

After you bought Pro, you would have got an email from LW with a link to your Pro personal download page. Have a look through your emails & see if you can find it. If your Pro's still current then you can use that link to download another installer. If you bought from the official site, LW will send you an email telling you when your Pro's about to expire

I'm not sure what you mean about the forums... there's a LW forum (click on link): LimeWire Forums which is solely for LW.
And this forum, which is a forum for gnutella clients in general, rather than just for LW. You don't have to be a Pro user to post on either forum.