Login in Theme Forest with your buyer account.
Go to Downloads
Go to your purchase and select License Certificate and Purchase Code
Copy the buyer code from the text file
Paste the code in Theme Options –> Notifications bar –> and click the button “CHECK LICENSE”.
Refresh the page after you see the message “Your copy of the theme is activated” and you will see all theme options
You will need the same license code to register for a support account in client support system – http://support.wpestate.org/