my couatl.exe crashed as well. However, P3D keeps up running.
Your problem is entirely different than the one reported here, which was the sim crashing, and causing Couatl.ext to crash because the sim crashed. In your case, Couatl crashed first, which shows that, if Couatl crashes, it won't cause the sim to crash.
Pfad des fehlerhaften Moduls: C:\WINDOWS\system32\Sens_oal.dll
This problem indicates the Couatl, again, is not the cause of its own crash, but it's your audio driver that crashed. This .dll is part of the OpenAL implementation made by Creative. We use OpenAL for sound but, of course, if the drivers are bugged, they will likely crash the program.
The OpenAL situation with Creative is a bit of a problem. A while ago, Creative fully supported OpenAL, and their implementation was the best one, supporting many features specific to their hardware. But lately, they abandoned it, so the project went back to the Open Source community.
On 99% of the audio boards, we get to use the default OpenAl, which sits on top of DirectX but, if the audio driver provides with a "native" version, which in your case is Sens_oal.dll, it will use that by default but, due to the situation with Creative, it seems there are some bugs in the drivers, which might not be fixed.
If you are able to select another audio device in the GSX audio settings (it might be the same audio card, but using the software OpenAl, instead of the native one), you should select that one.