Having purchased a theme and associated plugins from Envato and subsequent licensing/support issues (developer vanished) my advice to anyone reading this - STAY AWAY FROM ENVATO!!
You, web site developer, are not their customer.
They are here to sell digital goods while pretending to offer you support. In fact, if you read enough posts in this forum, you will see that their only obligation to purchasers of these digital goods is to tell you to contact the author.