Same issue as described earlier by CAM regarding the 3D view not showing. Test Build V3.04 exe file still works fine, but the 4.01 Beta build just shows a grey window. This might be a server side issue as I has to get 'reactivated' for 4.01 to run with the 3D options rather than defaulting to 2D?
Scroll to the right to see the grey 3D window below.