If you are using the Free version and just bought the pro version now, but don’t know how to active it then follow this guide.
First, deactivate the free plugin from your Website Plugin list.
After login to Master Addons account you will see your websites list. You can add multiple website from the list. The dashboard will look like the following screenshot.
Navigate to the Downloads option. Then download the latest version of premium Master Addons plugin. After finishind download, just install this pro version in your Website. Follow the same plugin installation steps.
From the licenses option, you will get your license key. Navigate to the license option and copy this key. It’s necessary to activate the plugin after installation.