Thanks for telling me. I've now updated the website. All files will now be zipped automatically on upload to stop this happening again.When opening the file in AS11 it generated an error message: Could not open file. Error details: Bad file header: PK
You should see in the Anime Studio file that I shared, that everything was created within the program, i.e. no imported objects.
If you want to use an imported 3D object (.obj), Anime Studio can import textures. If you use a program like Blender or Daz Studio, you can 'bake' the lighting into the texture. But then it would be better to work the other way around, and export from Anime Studio into Blender.