It's really annoying that when I click the red X on JabRef that it doesn't hide the window and keep running like almost everything else. I'm sick of having to leave it open in the background (an annoying extra window) or restart the program. Could you consider offering an option in preferences? The best you have is "Minimize to System Tray", but even that you need to click every time because there's no option to leave it on, and then double-click (very un-Mac-like) to reopen. Very frustrating. Otherwise, great software. Thanks!