Hey Wes,
when in VoidWorld (NVil) and exporting from 3d View with "Sub-D toggled on", the cube is going to be exported as sub-d cube (round edges), when Toggle "Sub-D off" and exporting, it will just be a box (no rounded edges here).
I was not aware, that one have to freeze Sub-D in Modo, before exporting... so what you see in the 3D-Viewport is not, what you will get on export (if you not freeze).
Ok, I gain some hope to finally find my toolset to dive into, hehehehe
Have a sweet day...