Title says it all. I wanted to update DCS before New Year's but not actually play it so I ran the launcher, updated, and it loaded to the DCS Login screen:
Log In - Logs in and runs the game, no problem.
Cancel - Does NOT log in and runs the game, no problem.
The problem is that there is no QUIT button.
Pressing cancel logged me into the game, which I quit, then for some reason the DCS Login screen popped back up every time.
I eventually had to ctrl-alt-delete and kill the launcher 3-4 times.