I had to reinstall VoiceComputer. I used the download link I received by email to make sure that I'd have the latest version.
I thought that I uninstalled the previous VoiceComputer, using Programs and Features. I reinstalled VoiceComputer using the new download.
Configuring VC Microphone brought a surprise. I did not see the command Activate Microphone but the command Listen to me. The old configuration dialog was back.
I began wondering if I misremembered uninstalling the previous VoiceComputer. So I completely uninstalled VoiceComputer. For good measure I also deleted the entire VoiceTeach folder in Program Files x86 and re-installed VoiceComputer.
This changed nothing. I am still using the old VC Microphone configuration dialog. This dialog is apparently not connected to VC Microphone. VC Microphone does not work at all when I say Listen to me or Wake up.