Are you saying that the Quick Mission Builder doesn't work properly at all?

I've got some quick missions saved up that come literally from the Forgotten Battles version 1.0 days. That's from several years ago and through several major expansions and updates to the game. They still work in the new format...

So the new QMB updates aren't likely the crux of the problem. My guess: Either your patch is corrupt or some files that the QMB is trying to read are corrupt.

Can you give us some more precise details?