Oh man, c'est dommage pour moi. I guess I'll have to do without the plugin, since there's no way I will ever install Java. Java and Flash are banned from my world.
Any chance of the functionality being put into the app itself?

I do not have any Java SDK installed on my Mac (macOS Sierra). I have the App Store version of SH3D. How do I install a plugin? I spend an hour searching this site and could not find any instructions for this situation, so I had to create this new thread.