Serato DJ PRO uses the same library as all other Serato software. If you are an existing Serato software user all your music, Loops and Cue Points will be available in Serato DJ Pro. If you create a library in Serato DJ Pro and then install Serato ITCH or Scratch Live the music Loops and Cue Points from Serato DJ Pro will automatically be available in Serato ITCH and Scratch Live. Any changes made in either program will be written to the library so if you have existing Loops and Cue Points, be aware of this when moving between systems.