This update includes macOS Big Sur support, and a few other features/fixes.

Enhancements:

• Keyboard shortcut for 'Fill' brush
  
• Right mouse click shortcut for 'Eraser'
  
• Added 'Border Padding' option to sprite sheet exporter for increased compatibility
  

Changes:

• Increase 'Force Specific Colors' to allow up-to 8 colours
  

Bug Fixes:

• Fixed macOS Big Sur compatibility
  

You can see the full changelog at the official documentation.