Here is the definitive answer from Simon at PGMusic Tech Support as to why I was not able to get Kontakt plugins like my Emotional Piano to show up in BIAB.

Much more complex than just hunting for my VSTi in BIAB "Options". Explains completely why this was NOT the solution.

From Simon's note to me:

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Plugins like Kontakt need to be "added" to BIAB - they are not automatically added. To do this, please look at the "Plugins Options" section of this manual page: https://www.pgmusic.com/manuals/bbw2024full/chapter4.htm#mixer

In short, you'll need to open the Plugins Options window, then add the plugin from there. By default the VST2 plugins from Native Instruments are installed to "C:\Program Files\Native Instruments\VSTPlugins 64 bit", however yours may be located elsewhere. Adding the plugin to BIAB only needs to be done once.

Once the plugin is added to BIAB, you will need to add the plugin to each track you wish to use it on. As Kontakt is not a General MIDI plugin, it will not work as the default synth, and must be added to individual tracks. Please see this tutorial video:
In particular, 3:18 explains details of what types of plugins will work in BIAB, then 5:36 explains how to add a plugin to a track.
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Tomorrow I will be following his instructions precisely and hopefuly it will end my saga of floundering for several days with what seemed to be a very simple, straightforward task. Especially since I got several VSTi's to work immediately in BIAB....EXCEPT for the Kontakt based ones.. Very eye opening and frustrating to this Newb how complex and confusing this stuff can get. And no amount of searching the Web and Forums can seem to help in some of these issues.

Anyway, hope this benefits others with the same issue. And Kudos to Simon for a very clear explanation. There is NO WAY I would have figured this out otherwise. God Bless BIAB Tech Support !!!!!

Best,

Newbie Bob