That solves the issue and also answers another puzzling event. A year or two ago, after a few minutes flying fSX my graphic card would suddenly give up and the screen go black. I thought it was overheating and bought a new fan. The problem seemed to go away after stopping all window updates. It looks like the real problem is that my graphics card does not like DX9 and that I had inadvertently solved the issue by clicking on pre DX10. The graphic card is an old one due for retirement soon. Once again thanks a lot. Here is a pic of the F111 on the tarmac.
I tried to take a snapshot of the Western Isles, but the screen went black. Please feel free to send any "postcard" wishes of Scotland and I'll send one when I have a new graphics card.
Many many thanks. The "support" was very much faster than several companies I could name.