You can now design your files in Inkscape then cut to your Craft Robo or Silhouette directly from Inkscape. Angela at Cards U Like has posted a very easy to follow pictorial showing the steps involved.
Think of the time you can save. You do not have to save as DXF and import into Robo Master to cut. You can design and cut from the one program, Inkscape. Go and have a look and give it a try.