Thanks Dwayne!
I updated the 940MX driver to 442.50 but unfortunately, that didn't help
I booted to BIOS but unfortunately, I don't see an option there to switch between Intel and NVIDIA.
Also, in the NVIDIA Control Panel, under "Manage 3D Settings", I set the 'preferred graphics processor' to NVIDIA, and under 'Program Settings', I also set the preferred graphics processor for DaVinci Resolve to NVIDIA. But none of this helped either.
Any other ideas as to what my problem might be..?
Just FYI, I tried opening the other programs that were installed with the whole Blackmagic 'package', and just like Resolve, I'm not able to open Blackmagic RAW Player and Blackmagic RAW Speed Test either (same as with Resolve: I see the wheel/sand clock spinning for 1-2 seconds, then nothing happens). I am however able to open DaVinci Resolve Panels, DaVinci Resolve Project Server, Fairlight Panel Setup, Fairlight Studio Utility. Just mentioning this in case it is conclusive to the underlying problem.
Thanks again!