What's in this folder "C:\Program Files (x86)\VB\Voicemeeter" ?
EDIT: also look in "C:\Program Files".
LivePro needs Banana also it's just if you can't get your standalone to work with Banana.
When you right click on the speaker icon in the task bar do you get VoiceMeeter in the Playback/Recording ?
Solidrock -
I am a complete idiot! 
I didn't see "Banana" in the Start Menu because it was in the VB Audio Folder. It was always there and I now have "Banana" working.
Now - Rather than going back thru this thread and just getting more me confused, can I ask you to repeat what settings I should try in order to get BIAB and a piano software standalone package to both play at the same time?
Thanks again - and please accept my
profuse apologies. <sigh>
EDIT: Yes, I DO now get VoiceMeeter in Playback and Recording by right-clicking on the speaker icon. (Voicemeeter input and Voicemeeter AUX Input, and Voicemeeter Output and Voiccemeeter AUX Output.)