RogueKillerCMD works with RogueKiller Premium version, no need to buy 2 different licenses.
If you have installed and registered RogueKiller on the same machine, it will be recognized immediately.
If you need information on how to register RogueKiller, please read the dedicated documentation.
If you don’t use RogueKiller and still need to register, the best solution for you is to use the “-register” command line parameters. Please refer to the command line reference for how to use the command line parameters.