Hi Benz1,
I just want to let you know that my host has restored my account and deleted the wp_gcb table before I had the chance to ask them to do so. For fear of jeopardizing my account again, I didn't attempt to install GCB again to identify where the glitch was.
It's too bad that I don't get to try GCB, but much thanks for your speedy responses! Keep up the good work, and perhaps I would be able to use GCB in future projects.