Your key
Lost your key?
Enter the email address you bought with. If it bought Weir, the key is sent there again. The page says the same thing either way, so it cannot be used to find out who bought what.
What to do with it
Open Weir, go to Settings, and paste the key into the Licence box. Weir checks it on your Mac and keeps working offline afterwards. It covers three Macs.
Still stuck? Email vhicktour@yahoo.com from the address you bought with.