okay, so i refreshed my sources this morning, and installer prompted me for an update, which i accepted, but when it finished, i got package download failed, so i cleared my queue and tried updating other updates that i saw were availiable, and somehow i said my installer finished updating and it auto-springed. now i cannot access Installer anymore, it always crashes back to springboard. I tried setting 0755 permissions to /Applications/Installer.app and /Applications/Installer.app/Installer but to no avail. Whats the best way to re-install installer?