Two editor windows when I only open one

Questions & Answers
1

For some reason when I open the Unity 4 editor(Free), it opens two instances of the editor. They both show the whole editor. When I start the game on one window, it also starts in the other. Debug output goes into the console on the window which is not in focus etc.

This is highly annoying, and has never happened before today. If I try to close the top window, the other one crashes. If I close the bottom window they both close.
I have done no changes or installed anything special since the last time I used the editor.

Anyone encountered this before? Any known solutions?

I’m running it on a Windows 7(x64).

2

Ok, found the fix. Really stupid of me not to try this first actually.
Seems the layout was at fault.

If you have the same problem, just go to “Layout” on the top right corner of the editor, and select “default”.
This made it back into just one window.