<< Export curve
I believe you must export object then extract curves in Moi! ;)

It's the limitation of the OBJ format

but you have the export DXF ! ;)

Seems not working inside Moi :(

So I use the free astonished PCONPlanner https://pcon-planner.com

Import inside the DXF from Rocket 3F then export inside Moi DXF that works! :)