I've not had any crashes closing FG-X.
The only time I have issues is when trying to save a preset within the FG-X.
That will crash and create a "mini-dump" (a steaming pile of pooh; IMHO) EVERY TIME!

Man that stinks!
But, I CAN save presets with the "Presets" in the upper left corner, or
the drop down menu "VST"
I know its not the SLATE, but the same thing (FG-X is out on the DAW)

Is it "better" than Ozone or TRackS, you can get things LOUD very quickly.
I HAVE all three, do I NEED all three?...
HTH,
Tom