Same thing happened to me, and a reboot fixed it.
I was getting a crash whenever I tried to drag select some keys in GraphMate. Whole computer would freeze. A control alt delete and select task manager would snap it out of it. I didn’t actually have to end the task, and I can continue to use Daz until I try to drag select again.
I’m on Win 7
Daz 18.104.22.168 64bit
Oh, and can I suggest a feature?
A button to fit all curves to the GraphMate window. Would be lovely if you could alt-drag the mouse to move the window around like in Maya too, but the fit all curves button would be enough
Anyway, love your tools. I’m a Maya character animator and Graphmate/KeyMate make Daz a surprisingly good package to animate with.