If you bought pro from www.limewire.com less than 6 months ago, you should be fine. When you bought Pro, you would've recieved a link to your personal download page... just download a new version from there. If you didn't save the link, go to toe page below & enter the email address that you used for purchase
http://sales.limewire.com/support/pro_lookup.php

If you didn't buy Pro from the official site, or if you bought it more than 6 months ago, your address won't be in the database. You'll have to buy again

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Reply by PM will work. You'll see an error page but the message still goes through.
Else, start a new thread titled "your original thread - merge".
A moderator will merge threads when they get the chance.