• New features
  • Automatic chamber vent opening/closing (C1/+)
  • Belt tuning wizard (C1/+)
  • Faster and more responsive Prusa Connect experience
  • Nozzle cleaning failed wizard
  • Auto-retract (MK4 family, XL)
  • Auto-retract improvements (C1/+)
  • Auto-retract disable option (C1/+)
  • Selective factory reset
  • Chamber support for backwards G-Code compatibility (C1/+)
• Changes and improvements
  • Improved print status messages
  • Lazier homing, more cautious calibration
  • Autoload improvements
  • Unified XL & CORE One chamber filtration
  • Option to continue after nozzle cleaning failure
  • Print sheet detection (MK4 family)
  • Respect maximum printed Z position
  • Gearbox alignment calibration (XL)
  • Filament change from Tune menu in any tool (XL)
  • Support cancelling more objects
  • Wi-Fi signal strength indicator
  • BSOD knob press behavior
  • Reworked filament sensor evaluation
  • Ukrainian language support for all printers
• Fixes
  • All the fixes from the 6.3.X releases have been expanded to other printers.
  • Various fixes and stability improvements

Summary

• Display refresh rate fallback to improve stability
• Fixes for rare BSOD crashes during filament handling

• Reduced USB errors
• Fixed returning to wrong Z position after pause

• Fix consistent layer shifts
• Fix stack overflow
• Improve network throughput

• 'Not HF Nozzle' status reset post-update
• Recalibration of X and Y Axes after reset
• Support for M30 G-code