Edit->Preferences, click on advanced tab and then /untick/ "Enable undocking of Editor and Console to separate window". Ensure hide editor is unticked in the view menu as well. This will force openscad to display the editor window in a docked configuration, retrieving it from oblivion. I had a very similar problem to the original post which happened when I clicked the undock editor button (top right of editor window) and the editor window vanished into oblivion. I'm not sure why. But clicking hide/show in View menu had no effect. I was able to retrieve the window with the method above. I think it might have been because I had been using a two screen setup previously and the editor window might have been displayed off screen but that's just a guess. HTH -- Sent from: http://forum.openscad.org/