These are the most common Ranger licensing unlock scenarios, with links to additional information:
Scenario 1: You have a new license, and you are unlocking it for the first time.
Scenario 2: You reinstalled Windows or performed a factory reset on your workstation.
Scenario 3: You moved to a different workstation, or replaced the workstation motherboard.
Scenario 4: The Windows Registry entries that Ranger uses, was modified in an unexpected way.