I agree that this is like chasing the wind. I went ahead and uninstalled FSX-SE. Since DTG ( on the steam forum) is not even acknowledging that there is a problem or at least that they will look into it, I will let them concentrate on their DLC.
Its likely that I will remove all flight sims from all my PC's; they all have "chase the wind" issues to one degree or another, and since there is nothing I can do to help, there is no sense being frustrated.
Until there is a good reason for "me" ( I speak only for me ) to care about flight simming, I will take up another hobby for now. SCS Euro truck sim is stable, looks great/real , is now 64bit (before it needed to be), there is steady progress, and good steady communication from the developers.
Take care Pete,
paul