A simple and Minuscule (around 7 Kb) batch file that forces DCS to close when it just doesn't want to when you use task manager or ALT + F4. I made this for myself, but you can use it too. Be sure to run the file as administrator or else it (probably) won't work any better than task manager.
Simply works far BETTER than ALT + TAB + DELETE AKA TASK MANAGER !
Great for rage-quitting too! Really, I've used it mostly for that.
