I had a support person respond to my request with the following advice: "Please open Spybot Settings and switch to the Categories tab. Deselect all products except Trojans-ZL-000. After that rescan your system. In case it
again stops, make a screenshot of the whole Spybot window and add it to your next mail to us."
At first, I could not get the Settings menu to open for two days, but then this morning I ran the Update option a couple of times until all updates were made. The Settings menu finally popped up! Then I followed the directions above and ran the scan with only Trojans-ZL-000 selected. It ran fine except on the last item to be checked (Firefox bookmarks), it took about 5 minutes to complete.
After the revised scan completed with no issues, I went back and selected all the Categories in the Settings menu and re-ran the scan. Again, it took a long time to complete the last entry (Firefox bookmarks), but it completed successfully, showing me a number of things to be fixed.
It looks like I finally have a working Spybot application!