To replace your Fractal eXtreme unlocking code
Contact Cygnus Software at firstname.lastname@example.org if you need to obtain a replacement unlocking code. If you backup your registration code then you should be able to relicense your copy of Cygnus Software with this registration code.
If you originally purchased Fractal eXtreme using Sales Agent from Release Software then your old unlocking code will not work on a new version of Fractal eXtreme. Contact Cygnus Software at email@example.com to obtain a new registration code.