Medusa4 CAD files in SHE format can be exported to some other, more common CAD formats directly in the program itself. There is a dedicated CADConvert program integrated in Medusa that allows users to perform various CAD conversions with formats like DWG, DXF, IGS, STL and perhaps more and should be fully capable of she to dxf conversion or export.
Open SHE file Open DXF fileA dedicated 2D/3D CAD software