Activating theme for updates
Customers coming from Themeforest should only need to use Envato Market plugin to get updates for their themes directly via your WordPress Dashboard. There is no additional licensing required for Themeforest customers, and the license page in the admin area is only there for the themes purchased via codestag.com.
Here's a quick guide showing How you can update Themes via Envato Market plugin.
Hope this helps!
Let us know if you still have any other questions at Codestag Support 🙂