Options for mashups

I only use DJ Studio to create mashups of just two misical files. The separation of melodies, drums, bass and vocals (green, yellow, red and blue tracks) can only be activated when there are at least two tracks, and also only when fading between these two tracks. It would be nice to be able to import a music file on a single track, so as to be able to export stems in 4 separate tracks and in their entirety, not just when fading between two tracks. Or perhaps create a mashup-only environment with options essential to the mashup :)