If your license key has this format XXXX-XXXX-XXXX-XXXX and has a license ID with the format XXXXX or XXXXX-XXXXX, follow these steps: This is a previous format used for license identification. The Activate license button becomes clickable when a valid license key is entered into the corresponding field.Īctivate your license key with a license ID In the top right part of the window, click Activate license.From your desktop, click the Malwarebytes icon to open the application.If your license key has this format XXXXX-XXXXX-XXXXX-XXXXX, follow these steps: If you do not have a license key or cannot locate your order confirmation email, go to the Malwarebytes website to buy a Premium subscription or see how to find your Premium license key. Your license key is located in the order confirmation email that was sent to you when you purchased your Premium subscription. To activate your Malwarebytes subscription, you must have a license key purchased from the Malwarebytes website.