I now tested the ORBX free airport pack available for V5. KPNA is an airport where I had immediate crashes with the old pack from V4.
And you know what? No crash. You are surely right, Rod, that this pack is different. Did work up to 5.1 but not in HF1 any more, obviously.
Your hint concerning the audio driver is a good one. I will test that. Hmm.... I'm nearly out of crashes now. Haha!! I still can cause a crash when enabling the HD buildings. I will test it with that one.
Klaus, under no circumstances update the scenery!
.... I'm joking of course.
Karl