Hi @giuseppelala87,
Your purchase code will be required only to register your account in our support website.
However, you can also create a new API token for Envato Market (https://envato.com/market-plugin/) to received updates for your theme.
Once the plugin is installed and activated, go to “Envato Market” in your admin menu and follow the instructions under “Activate Envato API Connection”.
When this is done, you will see your purchased themes under the “Themes” tab and you should be able to update your Gwangi theme from there by clicking the “Update available” button.
Regards,