Painter 2019 crashing at launch

Corel Painter 2019 crashes when I launch the application. A brief history: The computer would not recognize permissions correctly, and I was unable to save particularly Numbers files. My computer tech reinstalled Mac OS 10.13.6. The computer booted successfully after reinstall. He updated third-party apps and cleaned old cache and preference files.  He used a "cocktail for Mac" to run maintenance scripts and rebuild databases. But, Painter still crashes, and I have sent the crash report to Corel 5 days ago, and no response yet. 

That is all I know, my knowledge of this is limited, and I'd appreciate any thoughts. Thanks much, all!