XP10 Default KingAir C90B Autopilot

[Warmbrak]

I love the new King Air C90B in X-Plane 10, but I cannot disengage the autopilot once activated. I have figured out it should be engaged by pressing either HDG or NAV and ALT or VS, but deselecting them does not turn off the autopilot. Am I missing something on the panel, or do I need to assign joystick buttons for for autopilot and flight director engage/disengage?

I also cannot find the parking brake, and may have lost it on my last landing when I accidentally enabled beta stage on short finals