Can't access brushes in purchased brush packs

On a Mac.   Installed brush packs per instruction.  They installed with no problem.   When I go in to finder, the brushes are in /Applications/Corel Painter 2019/Brushes/Splatter/ for instance.   But in CP2019 when I can see the brush pack names I only see the brushes in the last old brush pack like Real Watercolor.   If I'm in Real Watercolor and switch to one of the new brush pack, I still see the Real Watercolor brushes.

How can I access the brushes in the new brush packs?

Hal Work

Using Painter since 2006