If you don't see a place to write your email in, this means you're not recognized as a Patron who backed the Kickstarter. If this is wrong, please send me a message on Patreon or via email.
The site will be refreshed and you will see a notification, saying if the email was found in the backer list.
If everything goes correctly, the troll will be added to your library (and you'll get an email with the download link too).
It's not yet pre-supported, but once it is, the Order in your library will be updated with new files!