New "Quadron v1.23.tap" and "Quadron v1.23 demo.tap" files uploaded:

  * added redefinable keys option by popular request. Choose between standard keyboard (original layout) or redefinable keyboard menu options    
  * redefinable keys option made available in demo version too

As usual, an associated "Quadron v1.23.sna" snapshot file is also included for completeness.