OK guys, thanks for all the input regarding this. I contacted Support (Mike) today, and he pointed out how this works!

In 64-bit BIAB, the "new" approach is to avoid using the Tool labeled "Audio Chord Wizard". That is the "old" way, which works fine in 32-bit version.

With 64-bit, simply use the menu File | Import | Import Audio (WAV, WMA, MP3, WMV)
(Doing this works quite fast, there is no Green / Yellow message, which made me think something was wrong, but it's not!)

The Audio track appears as an Orange color, and then the trick is to change your "View" by using the "Audio Edit" icon on the "Views icons.
There's your audio..... works fine! Ahem.. just a newbie misunderstanding on my part. Great support folks!

Jerry
2019 BiaB Megapack (634), RB 2019 (Build 4)
Reaper 5.983 x64, Audient id14 USB interface, Voicemeeter Potato 3.0.0.8, Nektar LX49+, Roland E20
i7-6700K Skylake desktop, 64bit Win10 Pro(1903), 32GB ram, 512GB system SSD + 2TB data SSD