If anyone is encountering this persistent issue and is having trouble with the terminal commands in the solution, you might try adjusting the commands to:
HTML Code:
cd ~/Downloads
chmod +x ResetDisplayPrefs.command
sudo ./ResetDisplayPrefs\.command
I found that iOS rebuilds the deleted files upon reboot, which starts the problem all over again. For now I just drop the above in the terminal when I start up in the morning and then don't reboot at the prompt. It's an annoying couple of extra minutes but works, unless anyone has a better idea.