I did a clean install of everything, then adding just the PMDG 736. I was able to do one flight (wthout capturing the gameplay), but the second one again crashed (this time I was recording both with shadowplay and the replay tool).
Anyway, I don’t know if it can be the cause, but I just had a crash during which I monitored some parameters. Specifically, I have the paging file enabled and managed by the system, on the same ssd where msfs is installed. During the crash, as usual during the final part of the approach, I saw a jump from 32 GB to 46 GB of the dimension of the paging file, that coincides to the moment of the crash.