Well, the logo is here:
pianobook.co.uk/stories/2018-12-21-we-have-a-logo/
The instruments that you see with the logo were probably converted by Fred Poirier, as he converted hundreds from other formats to DS.
youtube.com/watch?v=zoI72uGVPzQ
You can follow his lead and place the logo in approximately the same place using a photo editor such as Gimp (free) or Photoshop (not free).
