In the latest version, clicking on the Airfield icon in the mapping options toolbar brings up a dialog where you can set which types of aerodrome are displayed and optionally limit it to airfields with runways greater than a certain length.SkyDemon does not map disused airfields per se, but it will show them if they are notified VRPs for an airfield. If you believe there are any notified VRPs that we are missing, let us know along with the airfield they are for.