We've extended the 2D export options to allow Impact to generate a wide range versions of DXF format (both ASCII and Binary) for greater file exchange compatibility and feature support, previously fixed at the built-in version of 'AC1006 - DWG Release 10'.
Additional DXF export options have been exposed from an existing third-party library
A new option to generate the alternate binary (vs ASCII) format of DXF is also offered for all but the built-in selection
See also: Export, AutoCAD Exchange