How long ago did you buy Pro? Pro payment entitles you to 6 months of free updates & email support. If you bought more than 6 months ago, your email address won't be in the database any more In that case, you'll have to pay again.

If you did buy less than 6 months ago & from the official site Lime Wire » Official Website & Free Download « then send a PM to limenathan (click on the blue link below). Let him know what's going on.
limenathan

Always remember to save & back up your Pro installers