It's hard to say. When I first load it that window is totally blank.
If I choose reload level I get a message about some empty layer(s) and a notice that they will not be saved. When it loads I see the banner that says Fort Joy Beach for a moment then blank again.
If I choose reload story and level then it shows the banner at first, a message about a way point discovered and the hot bar appears the rest of the window is still blank.
Ok so I reloaded it and played around with holding the center button down and moving the mouse and saw something in the view port. It seems that when it loaded it was zoomed way out and at an odd angle so the window just looked blank.
It is cool that an editor like this is provided but it is hard to find info as to how to use it. Would be so much better if there were a help option within the editor.
Thanks for the tip with the mouse button, maybe now I can experiment a little
