dwg

I'm having trouble importing a DWG that has been exported from Vellum-Ashlar into Alibre. It's a drawing from my dad so I'm not sure if he exported it incorrectly or if I'm importing it incorrectly. He only knows how to draw in 2D so it should be a 2D file, however, I'm not sure how to confirm...

I have modeled a sheet metal (sheet cardboard) part and I can unfold it with flat pattern. But how do I export it as something like a .dwg file so I can feed it to my laser cutter? There must be an obvious way that I just can't find.