When you purchase Fonts Plugin Pro your license key will be included at the bottom of your receipt email.
Subject: Fonts Plugin Pro Purchase
Your license key and receipt is also accessible at https://fontsplugin.com/account/
You will need to login first, if you don't know your password you can reset it here.
Once you have logged in, click 'View Licenses' and then 'Manage Sites'.
If you have already activated a site it will be shown here. Otherwise it will look like this:
If you are having trouble retrieving your license key, simply email our friendly team (firstname.lastname@example.org) and we will be happy to retrieve it for you.