Well, I spoke too soon.

Although there was no problem with responsiveness the first several times I got into this dialog, killed and restarted BIAB, etc., the problem quickly returned. Now, each time I get into this dialog with the vsc-vst selected and JAWS running, the computer crawls to a halt. When this happens, I can't even shut down BIAB, even if I go to the running processes and try to kill all processes in the bbw.exe process tree.

I'm out of ideas. Everything works fine if no synth is selected, but if the synth is selected it's bad news!

-- Pete