Roon won't start on Windows 10 PC: "OpenGL 3.0 Required" [Solved]

Roon won’t start on Windows 10 PC: “OpenGL 3.0 Required.”
It’s a Core i7 PC w/ an NVIDIA GT240 graphics card.
I’ve read some threads on this problem, but it hasn’t helped.
Roon was running fine, but Windows did some updates a while back and now Roon fails.
Thanks for any help.

Problem solved. Uninstalled Roon and rebooted and reinstalled.