Best way to convert 2021 brushes for 2019?

Crossposted to Reddit at

I recently grabbed Roxy's brushes and they're lovely, but she exported them in Painter 2021, so I get warning messages that brushes may look different than expected, although Roxy says that she actually originally made them in Painter 2019, so there should be nothing new. Short of opening each brush and saving a "variant", is there an easy way to fix this?

  • FWIW, I realized that the Save Default Variant effectively saved over the current brush with the current version, so I knocked out the twenty or so brushes pretty quickly by assigning a hotkey to that operation and then just clicking on them one by one, acknowledging the error message, hitting that set of buttons, acknowledging the operation, then clicking to the next brush.