Painter 2020 crashing and giving error message "not enough memory"

Just upgraded to Painter 2020.  I've only had the update 3 days and I get the error message "not enough memory" after almost every thing I do such as pick a brush.

I am on a MAC LAPTOP PRO, 16 GB 2133 MHz LPDDR3,  2.9 ghz intel core 17, using Mojave.

This is driving me crazy. I upgraded from Painter 2016, where I never had a problem.

Help, please.