Here’s a fix that worked for me on the load crash, you need to get rid of the old settings profiles. It’s similar to above but is for the steam version.
Hope this helps… It appears to be a profile issue with the latest patch for some people. Please keep in mind this fix basically starts you from scratch in regards to settings, and I don’t know if you won’t have profile issues later with this buggy update.
Turn off cloud synchronization for MSFS2020 in steam. Right Click the title name (MSFS2020). Properties -> Updates Tab. Uncheck the box at the bottom for now.
In your Steam folder, look for a folder called “userdata”. Then look for a …