If your computer lacks internet access, you can choose the offline option in the License Manager. This typically involves generating a request file to be processed on another internet-connected device. Hardware Key Option: Some versions support a USB Hardware Key

Run the installer as an administrator. During installation, select "Professional Edition" when prompted for the edition type. If you already have the Standard edition installed, you can usually upgrade via the "Help" menu.

Once your is active, take full advantage of the premium features: