I tried this and Revo Uninstaller did not find Spybot S&D (I had uninstalled it, but for running the "small fix", before my initial post above).
I tried right-click and MERGE, but the exact same dialog box popped up when I did, at which point my only choices were Run and Cancel. I clicked Run and got exactly the same message I'd gotten previously.
Many thanks for your efforts here, but it looks like this issue is still unresolved.
Look forward to hearing more and many thanks in advance...