It's currently not possible to move licenses between accounts. We will however implement this feature at a later time. In the meantime, if you have e.g. sold your device, you just have to give the new owner the license files with the sale of the device. License files are bound to the device, not the account, and never expire (except the obstacle databases, which habe to be renewed every year).
Devices themselves can however be added to any account, but the licenses don't follow automatically.