What I do with issues such as these is this. I got AH game download on my desk top. I wipe everything and reinstall. Takes 5 mins. I do it quite often actually. At least this way u know u are starting from scratch. I only fly one plane so I don"t have a whole lot of head positions to save. Controlls are easy enough to recalibrate. This maybe your problem, it may not. Probably not. I do it all the time anyway.
But, you have to go to your C drive and wipe it all out froim there. Windows remove programs will leave some stuff behind that may mess up again.