The issue that seems to be causing the problems is with addon scenery that have a .CGL file in them. Nothing to do with reinstalling windows, memory or anything else. As soon as you turn off the .CGL file, the crashes stop. Apparently this file holds Bing data used at custom airports, but Asobo have changed something with how Bing maps operate which is why the crashes are happening to addon scenery. Asobo are aware and dealing with it as already acknowledged.