If you're getting a CTD, you need to post your log.txt file so we can see what is going on.
It's found in your root X-Plane folder, but only post it after a crash. If you load X-Plane again, the file get's overwritten by a new one.
Set a key or button press to "Toggle Thrust Reverse". This will get the Power Lever into the beta range. The more you drag your hardware down, the more it goes into thrust reverse.
If trim linkages are not damaged, check for ANY assignments that could be interfering with your autopilot or trim.
There is no known issue to this, and seems to be isolated to a few cases.
Sure, I understand.
I did speak to Saso earlier about this, and he did say he'll look more into it, and if it proves to be much better, overall, we would look more into using dds textures.
dds vs png is a bit of a confusing topic for some. (Including me a few years ago)
Here's the deal, in basic terms.
dds textures load faster. png files load a little slower, but not by much, because CPU's today make small work of compression algorithms.
So here are 2 images showing dds texture size and png texture size inside X-Plane (on disk). Pay particular attention to Fuselage_Rear.png and .dds
What do you notice?
X-Plane compresses png's.
The official word from Ben Supnik is that Big Sur is "prrrrrrrobably safe to install..." with regards to X-Plane. With regards to other add ons, not sure. But I've had no problems so far.