Oh, you tried to use the form to add a Legacy license from Envato Market – you don’t need that, just ignore it 🙂 Your license is already in your account.
It is for users who purchased from our old vendor (codecanyon.net), so that their licenses can be imported to our system manually.
All you need to do is just download the plugin, install and enjoy. If it asks for a license key after installation, just enter the one that is listed on your purchases section.