Track Arrow is licensed per server. The key is issued in your account on trackarrow.io and stored in the tracker.
The tracker verifies the key with the license server. A valid key is bound to this server’s IP. Moving the tracker to a new IP may require a reset from support or your account (when the product allows it).
The admin panel shows a countdown when fewer than 7 days remain, and when the license is expired, past due, inactive, or canceled. Renew at trackarrow.io, then refresh the tracker.