That's it! Thanks for the simple answer.
And now I have all my software updated, so it wasn't a total loss of an evening. :-)
The 'tricks' in Lightroom make learning interesting!
If you do not like the Color clipping indicators, then another method to see clipping is to- hold down the [ALT] key as you move sliders (Exposure, Blacks, Whites )- Blank white screen = no Clipping.
Thanks for the tips. I'm learning more every day.