Larry,
I reinstalled both, BIAB and H.S. and this crash thing is gone for me.
Two things that I did not mention:
A) I reinstalled H.S. by re-downloading it from Steinberg updater program and secondary package to update Halion Sonic to 3.2.10.94 Check your VST version (Click on Steinberg logo in VST-->About)
B) There was a recent Windows update that was pending (Win 10).
So far crashes are not coming back. I was pretty rough on mixer and other controllers of HS, while several channels were playing just to test it.
Misha.