Launcher has stopped working

I get the Eastern Front Launcher has stopped working error message when I try to launch the game. The log file is of no use as the last instance was the one that last worked.  I played a full game but upon leaving the stats screen at the end the game crashed and I have been unable to get the launcher to run correctly.  I use Win 7x64, and I get the UAC pop up, but once I click yes it goes straight to crash.  Any help would be appreciated, though I can always reinstall if I must.

You need to have installed .NET Framework 3.5, otherwise will crash.

I have .Net 4, so I need to downgrade?

No, just download and install 3.5.

.NET Framework implementations are not incremental, meaning that if something was made using .NET 2.0 it ain't going to run unless you have it installed, no matter if you already have .NET 3 or .NET 3.5 or .NET 4.