This is the most bizarre problem I've seen on any add on. Again, your log file doesn't even show a crash or shut down. It just shows X-Plane quitting, without even a clean shut down. It just stops. Even when X-Plane is shut down properly, the log will state "X-Plane has shut down".
One thing I did notice is that you're now running 11.4 b3. We don't really like working with beta's, but you did post logs from 11.36, so I can somewhat overlook that.
However, seeing as you were finally able to load it, I'm starting to strongly suspect this is hardware related. It may sound a little out there, but are you able to download some software (your choice) to check your CPU and GPU temps?
Also, it might be an idea to check your RAM. The easiest method is to use Windows built in RAM checker. Follow the steps here
Try those suggestions and post back. Keep in mind, we're trying to eliminate possibilities, so I hope you don't mind going through some of these steps to help figure out what's going on.