[brazen1]

Ok. Good news and bad news depending how you look at it..... literally. Your exe's are working with NVidia. They do not need to run as admin. Originally I D/L 1st version and test. Decided not to D/L new version because zip says same as old, v.1.0.0.0. I D/L anyway even though says old version but they must be new because compile date is the 15th. You should update zip version number.

MPC-HC only works using 'Custom Presenter'. It does not work with MadVR.
MPC-BE does not work. This may be other settings that need adjusting?
PowerDVD does not work.

MPC-HC looks good. Traditional playback (using Windows HDR switch) through all 3 players works and looks good. They also look more vivid. When you release a choice of various profiles, perhaps the more vivid look can also be achieved. I can't speak for non-HDR displays but my enabled display looks pretty good and others will be satisfied especially with profile choices. I don't believe there is any need to recalibrate between methods, at least by my eye.

I had hoped your exe's controlled the actual Windows HDR switch setting. I understand they don't now. A script of some sort for that would be most beneficial because file naming alone could induce auto switching to ANY player. I would easily be able to add it to playercorefactory or direct to a .bat or something. No manual input before and after viewing would be wonderful. That's my goal.

If anyone is talented enough to script that switch, now is the time to show your abilities.