A license key was included with your purchase of Schema Premium. This license key grants you access to support and enables one-click updates for the Schema Premium plugin from the Plugins page of your WordPress admin area.
Once Schema Premium is installed, navigate to Schema → Settings → Licenses and enter your license key in the box shown there. After entering the license key, click Activate License to register your website with the license key.
If at anytime you need to move the license key from one website domain to another, you may do so from your account page on the schema.press website.