Legacy brush not working in Painter 2021

One of my favorite acrylic brushes is Real Wet Brush.   I worked fine up through Painter 2020.   But, I guess the underpinnings of it have changed.   It now looks like a particle brush.  I would like to continue using it through future versions of Painter.   My workaround is to use Painter 2020.

Other suggestions would be welcome.

Thanks, Hal Work