Our entitlement keys (a.k.a licenses) aren't tied to a particular device, but are instead concerned with the total number of devices associated to the HiveManager at one time. You'll need to add the key to the HiveManager in general, in the Home> Administration> License Management page. If you're unable to navigate in the HiveManager due to all your keys expiring, please send me the entitlement key at communityhelp@aerohive.com and I'll add it to your HiveManager for you.
