The app I want to launch is Borderless Gaming. I don't play games that require it very often. So, I don't want to have to set it to launch when the PC starts. I found via this article that the way to launch steam apps via command line would be like this: steam://run/, so I came up with: steam://run/388080.

Adding steam://run/388080 %COMMAND% to the launch options of the game launched Borderless Gaming and then the game looked like it was going to open but it just crashed. Am I missing something?

edit: I am on Windows by the way.