Sadly, I'm not that good with the registry.
My config screen seems to be missing a "programs".
I took it back to it's original place. (C:\VNs\Grisaia no Kajitsu\frontwing\グリザイアの果実)
Some of my games (not eroge) won't start and it has something to do with the registry (.dlls too) or something, so that's why I thought maybe Grisaia has something in the registry too.
If you want to ask me too, yes.
I've played Morrowind, Oblivion and Skyrim, Fallout 3 and New Vegas too.