I couldn't install this Add-ons on Blender 2.8. It seems we need to install Phyton, something I didn't do. A Read Me file is included in the zip file.
As at present, I am designing (on MoI 3D of course) a housing for a hotends.fr on my Creality CR-X. So I don't have much time to deal with this add-on right now.
I also think it might be of interest to a lot of us. I therefore ask the following questions:
Did some of us install this add-on?
How to install it?
Is it compatible with 3D MoI files?
Does it bring something more than the conversion to.obj or.stl?