Tip for folks who have DS3 or DS3A set up your LDP2 Static Scene (Only they work) in DS3. Then NOTE the Dome Size, now save the Scene, Load the Scene in DS4.6 and RE-Size the Dome. This is a work around I use. Once done this way You can not Change the lighting but you can edit the ones that load.
It works well, but the Reason you can not Animate in DS4.6 is the Lights get Un-coupled from the Dome, so Animating the Dome only moves the Sky and Not the Sky and Lights like it did in DS3. Thus only Static Renders are possible.