currently, if you have a bunch of windows open in Atom 0.92.0 and quit the application in Mac OS X (i’m on v.10.9.2, Mavericks, with all the latest security updates), then restart Atom at a later time, you get just one blank window on re-opening.
the standard on Mac OS X since v.10.7 (Lion) has been to offer to re-open apps with all the docs/windows/tab last being open & worked on re-opening also. it would be nice if, in the Settings for Atom, it offered a check box with the option “Re-open all last open Windows on launch,” or something like that. this would be a huge time saver for everyone when having to restart Atom. please include this feature in future versions, at least for the Mac OS X folk, if not all platforms, as Mac OS X users are now used to this UX/UI paradigm.