Unity 4.6: Where's the sprite editor?

The Window menu is missing the sprite editor option. I also can’t find a method to open it otherwise; I can’t create sprite assets either.


Reading the docs is a good plan:

“A button to open the Sprite Editor appears in the Texture import inspector whenever the texture type is set to Sprite.”

(I know that the entry in the Window menu doesn’t exist any more - the 5.0 docs have been updated.)