@unusualsuspex
Well, took a quick peek and before I got started noticed that Ripper made empty files.
I should have caught that before sharing it!!
Some versions work for different settings, every version has some bug that kills.
Possible that SF recently re-tweaked their viewer (again).
Anyway, I should try different processing settings or another version.
<edit>
So it turns out the GitHub project has been 404'd. Sketchfab Ripper is still available, but IDK about the source code.
ANYhoo, I did locate the binaries of the latest version (one beta past the v. I was using), downloaded, and got it to convert to .blend and FBX. The .blend model is untextured in Blender (needs manual editing). The FBX looks proper in FBX Viewer.
No time, so I haven't tried converting to OBJ, or see how that goes in Blender; didn't try importing the FBX either.
I updated the link above in the OP, it should now have a good .blend and an FBX, and the textures are all still the same. Try re-downloading it!