IntelliJ 14, 15, 16:
Settings -> Appearance & Behaviour -> System Settings -> Reopen last project on startup
Previously:
Settings -> General -> Startup/shutdown -> Reopen last project on startup.
IntelliJ 14, 15, 16:
Settings -> Appearance & Behaviour -> System Settings -> Reopen last project on startup
Previously:
Settings -> General -> Startup/shutdown -> Reopen last project on startup.