Your problem has to be one of the "settings" files.
Do this:
Find your "settings" folder in C:\Program Files\HTC\Aces High II.
Rename it, something like "old settings".
Make a new empty folder, name it "settings".
Launch AH, it will rebuild the 6 default files in the "settings" folder needed to run AH. See if bombers work, they should.
One at a time, replace the 6 default files in your new "settings" folder with COPIES of the cooresponding files you saved. Each time you move a file, check in-game to see if it broke the game. Once you find out which file was causing the crash, delete all copies of it and let AH rebuild it with the default version. Then you can safely move all your head positions, stick and keyboard setting files back into the "settings" folder. That's a lot better then recreating them all manually.
We'll have to up some bombers together sometime.