For what ever reason the mouse look in aircraft did not behave properly the first time I used it. Having reloaded aces high rather than just relaunching an aircraft I am now OK with mouse look off and I now get my mouse curzer when the clipboard opens, as before the update - Pretty much back to normal in aircraft.
Noting HT's comments, because my key map was not the default I had to map a number of the new controls including shift + M. Mouse look was not checked the first time I loaded the game after the update, but it did actually default to that. The check box did not seem to make any difference at all - At the same time I had an initial problem in aircraft when the clipboard mouse curser disappeared with shift + M.
However, I would still like to disable the mouse in the tank (except for clipboard use). I am more than happy to use just my joystick when in the commanders position with my view buttons.