Have you tried rebooting your pc? I have had games in the past that once in a while would not launch in the same manner, it would minimize to desktop constantly. A reboot usually fixed it. Eventually it went away, probably because of newer video drivers which also couldn't hurt to update if yours aren't the newest.
If that doesn't work, see if the game launches in Windowed mode. Go to your user path (where mods go) and open user.setting in the Settings folder with notepad. There you'll find a line:
VideoIsWindowed FALSE
Set it to true, and see if it the game launches.