Using ArcGIS Explorer with no Basemaps

[williamporter]

I would like to use ArcGIS Explorer (AGX) with no basemaps - in fact, no internet link at all.  The County's Roads and Bridges Department needs to view the GIS roads we maintain as they populate and proof PubWorks.  I can't determine how to use no basemap - because even if I delete the basemap AGX is slow and seems to be reading from ArcOnline anyway. Lat/Longs appear although our data is State Plane. The Arctic circle, tropics and equator also appear. I don't want any of that. 

The screen with no basemap appears below.