Unfortunately, your log.txt file does not say much, or at least I could not see anything striking. Please note that I am just a normal user, I am not affiliated with Laminar Research.
My advice would be to install a second clean copy of x-plane (you do not need to install the entire world) and to avoid installing too many third party addons and plugins.
If a crash occurs, try to disable the newest plugins installed via x-plane plugin menu, or by uninstalling them. This methodology will help you narrow down the possibilities and identify the guilty plugin or addon. Once you have identified it, you should contact its developer.
All the best with that.