The following additions and fixes have been made!

Added

• Added transparent copy of selection 

Changed 

• Changed the application close key from ESC to F4 (ESC changed to deselection)
  
• Some help message

Fixed

• Export compressed audio file is not possible
• Issue where playback would not be possible if an arpeggio containing rests was selected and the octave was set to 2 or higher.
• The "export" folder may not be generated after unzipping.
• The oscilloscope display range would be cut off or out of the way when changing the audio buffer size in the settings