Installation Keys are automatically activated as soon as they are added (if connected to the Internet).
To manually activate a license:
Go to the MyQ Web Administrator interface, in MyQ, Settings, Licenses. Add your Installation Key and click Next. The online activation fails and you get the following message. Click on Manual Activation.
In the newly opened window, click on Download the activation request file.
Upload the file in the MyQ X Partner portal and download the activation response file.
Go back to the MyQ Web Administrator interface, upload the activation response file and click Activate.