Hi Martini.

If you deleted the Captain Sim entry in the registry, which removes ALL the registry entries for Captain Sim Products, your 767 should not work properly anymore either (unless you reinstalled it). You should find that you can't click on any knobs, not even the master battery switch. Not even using SHIFT+M (default keyboard command for the Master Battery/Alternator (on/off)) will turn it on.

Where is FSX installed on your computer?