Complete your theme setup by activating your license. This will grant full access to all features and customization options. There are two convenient methods to do so.
First Method : Envato Register
you should be Log into your ThemeForest/Envato account before hit the register now button

Second Method: Alternative of Register
This method base on the Purchase code. To find it of a theme you purchased from ThemeForest, you can follow this steps:
Step 1: Log into your ThemeForest/Envato account.
Step 2: Navigate to the Downloads tab.
Step 3: Locate your Theme, and click the Download button.
Step 4: Click “License certificate & purchase code”.
Step 5: Open the file and copy the purchase code.
