When you purchase Actus Deep Schema Premium, you receive a download link and a license key. In order to use the plugin, you need to activate your license. To do this, in WordPress Administration go to ACTUS -> ACTUS License. There you can see a panel named ACTUS deep schema Premium. Paste your license key in the box and click on the Save key button. If you entered a valid license key, the Activate License button will appear. Click on it and you are ready to use Actus Deep Schema Premium.