I'm looking for a way to trace back what happened and how to undo it.

I have GPO and the Studio already installed.
I didn't install Kontakt2 when I first installed F2007.
I upgraded to 2007a.
I installed the new Kontakt and upgraded it to the latest version online.
The system crashed on starting Finale.

So, I reinstalled the 2007a upgrade, thinking that would fix it.
Still - Finale crashes on starting.

I tried renaming the .dlls in finalevst to keep them from loading.
Still - crashing.

I feel like I got it to start a few times pressing the ctrl key with the icon, but that's not working now.