"Format not supported" Plight of RGB and ycbcr444

Hey guys, I was wondering if anyone might have an idea how to fix this.

I regularly plug in my laptop to my television to game or work and have had no issues other than some colors being slightly different. I played with the color settings and got it close, but the tweaker in me remembered reading that some people were getting more true color using the ycbcr444 color display settings. However, I didn't realize that my television does not support this format and now am unable to revert it back.

Is anyone aware of a way to do a full reset of the Nvidia control panel settings? I can't switch the color display modes for the external monitor if I do not have one plugged in, so this becomes a catch-22
 
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