No need to apologize. I created the Smooth Motion thread after reading your post
so you couldn’t have found it earlier - it simply didn’t exist yet.
I uninstalled the old NVIDIA driver using DDU in Windows safe mode. After restarting, I installed the new driver 581.08 without the NVIDIA app and rebooted the PC. I launched MSFS 2020 (DX11) and there was no CTD. However, when I launched it a second time, a CTD during loading occurred 