When you purchase a license from the Malwarebytes store, you can choose to purchase a license to protect multiple devices.
To see how many devices your license protects, refer to your Malwarebytes confirmation email or invoice, or see Manage subscriptions in My Account.
If your license was purchased through a third party, such as an online merchant or retailer, you need to contact them for license details, or register your license key in My Account for details on available devices. Refer to Add a license key to My Account for more information.