Email from them once you register:
Hello, NaGaDeMo participants! Thanks so much for trusting us with your email address — we know the eternal fear of spam under which the entire internet lives, and will not abuse this bit of knowledge you’ve given us. You’ll be receiving just a few mails from us: this one, about engine licensing (and perhaps one additional if another deal comes through), one about the kickoff, and a final one at the conclusion to let you know how to share your game.
IF YOU WANT A UNITY LICENSE:
Send an email to email@example.com with the subject “UNITY LICENSE REQUEST” — we’ll email you back your license code once we get it from the Unity people.
IF YOU WANT A STENCYL LICENSE:
1) Sign up for a free account at their website f you haven’t already.
2) Send an email to firstname.lastname@example.org which includes your full name and Stencyl username.