Read through a few threads and can't see anyone with quite the same problem I have.
If I have played and exitted the game and then try to start the game again I get the launch menu but when I press start I get a black screen and then after a couple of seconds I go back to the desktop. Sometimes deleting the .cfg file corrects the problem, although it seems generally I have to reboot my computer.
Not a big issue overall as I have a couple of workarounds, but one to have a look if you have the time.