The Remote Key Update (RKU) file basically contains Program ID, Master ID and Master License that encodes Key Properties, lists of User IDs, and commands. You can specify any file name for your RKU file, which must match the RKUB settings of your protected application. After creating the RKU file, you must encode it before distributing it to the user. This can be done by using LicenseKey Manager or Activation Manager.
When receiving the RKU file, the user must place it in the same directory as the protected executable.