It works on my version 2.0 just fine.

Oh, you need to "print" the file. Select the print option and then do the skin and spar things you want. The picture will come up on the screen and then the DXF button should be active. Hit the DXF and save where you want and then just cancel out of the print screen.

FWIW I like to set the skin to 0 and disable spars and stuff. Also because it prints in metric and my CAD thinks it's in inches when I import it the airfoil is HUGE. So I save the profili file as 20 cm and then resize in my CAD.

Hope this helps.