I'm on Win10 Pro. Is there a way to run this game in a window? The -w switch doesn't seem to work for me. The game always starts full screen. I find this to be a problem because I have five monitors and after closing the game, it often janks out my wallpaper and desktop orientations.

Here are a few options:
http://www.ghacks.net/2014/05/04/force-fullscreen-games-play-windowed-mode/

Wrappers might be a good option.