On the github page you can find the case file for this macropad in prt format, but it is not possible to import it on slicing programs, I converted these files into stl using creo parametric.
I also designed a small led cover to be placed in the hole under the star to be printed in transparent material, I used transparent resin and printed it with my mars.
github page:

https://github.com/kairyu/staryu