FH stops running, no error message!

[Hydraulis]

I was in MapMaker, making a map, and FH suddenly crashed. I thought nothing of it, I mean, it was lagging and my computer is old.
 I went to start it up again, and the Setup screen came up, which it usually doesn't.
I clicked "Okay" after checking all the options, but FH didn't start. I checked in Task manager, and every time I clicked "Okay" in the Setup Menu, FH stopped running, as if I closed it.
What's going on?

[Ramine]

You should wait 10 minutes or so, then try again. If it wont open you should restart your computer.
If the game still wont start, try to re-install? c:

[Hydraulis]

Okay, I'll try that. Re-installing is just a matter of downloading again, right? Or do I have to un-install first?

[Hydraulis]

And also, the problem is the Ogre Setup Menu. In the Task Manager, I saw that is comes up, I click okay, and it crashes. It has never come up before, so I'm wondering if there's a way to get right to the game.