Only by "Auto backup options" -> "Auto backup autosaves"
Gets messy but better safe than sorry.
<img src="http://i33.tinypic.com/241p3zl.jpg">
I enable "Auto backup options" > "Auto backup autosaves" but it doesn't work. It doesn't create backup autosave files, because Autosave is disabled. And if I enable Autosave - it save after each change in the scene.
Is there another way to autosave project?