Chris. Glad you could get MSFS working again. How is the Sim running on the new Windows update? I also updated to Windows 10 2004 tonight after reading that it could assist with crash to desktop problems I have been experiencing..
The update took ages to complete after which my computer was sluggish to restart. I could get MSFS to open but it took longer than before and could initiate a short flight or two. All went well until I tried to slew when it crashed again! Both flights were short so I could be wrong but my FPS also seemed marginally lower than before with the same graphics settings.
Hope I did not make a mistake by installing the update.