To open the file using a different program than the default one, simply select the available program that is listed and the file will open with that program instead.

If your Steam game won’t open or if you keep on getting “Failed to Start Game (Missing Executable)” error, there may be an issue with Steam application or with other software in your machine ...

You'll need to take the help of Steam's verify integrity game files feature to solve issues with the game files. Open Steam as an administrator and click the Library tab at the top.

However, what didn't change is the shortcut for it. The easiest way to open Nvidia In-Game Overlay on your PC is to use the keyboard shortcut Alt+Z to open it while in a game.