In order to get updates and support, you will need to register your theme with a license key. If you purchased it directly from us, you will already have it, but if you bought it from ThemeForest, you’ll have to obtain it using the purchase code they’ve given you (check this article to learn how to find it).
All you have to do is sign up to our website and enter your Envato/ThemeForest code in this page. Your purchase will be automatically validated, and you will be given your license key right the way.
Note that, since ThemeForest will give you a purchase code for each theme you buy, you will need to validate all of them this way to obtain a different license key for each one.