Thanks for the idea. I did update my graphics driver for nVIDIA using the GEForce Experience. However, I still get the same problem.
I noticed that the game is technically running (I can hear the sound of the intro screen, but nothing is displaying. When I mouse-over the icon in the task bar, it shows a translucent window with nothing in it, like where KSP would be if it was actually displaying anything.
Any other ideas? Thanks for the help! I really miss KSP.