The Heimdal license can be activated on 3, 5, or up to 10 computers, depending on the subscription you have bought. Once you activate the license key on the maximum number of machines it will not work on another one. So make sure to activate the license on the PCs you want the Heimdal Agent to protect. The same applies if you change your Windows operating system or you buy a new computer/device.
What do I do in this case?
You need to contact our support team and they will remove the old/unused device from the database so you can activate the license again on the newly installed OS or computer.