Editable file format import?

I’ve been creating objects in Illustrator and exporting them to dfx. Most of the time I can bring them into Shapr just fine. Occasionally a dxf will not import into Shapr. I believe they are too complex and Shapr just spins and never loads the dfx. I’ve been getting around this by bring the dfx into Blender, extruding it, then saving to stl. Finally bringing that into Shapr. I lose all editing ability as an stl. Is there a file format that I can export from blender that retains the ability to edit the object in Shapr?