There's no problem whatsoever with Zurich and Geneva, and they work just fine in P3D V4 here, as you can see from the attached screenshots.
What kind of AI are you using ?
A very common issue is that an issue with a corrupted AI file/texture, result in a crash only on some specific airport, which will disappear if the airport is removed, just because (due to different parkings and airline codes) the offending AI doesn't appear anymore with the default scenery. This can easily mislead you thinking the airport might have a problem, but it doesn't.
You can confirm this by reinstalling the airport and set all AI traffic to 0%. If the crash goes away, you can be sure it was an AI.