Due to a (couple of) problems I've had (if you are wondering....what the problems were check out this thread but I've got the problem solved now) I've deleted all Aperture related files except my Aperture Library. But now I can't re-install Aperture! After I click "Upgrade" and enter my password, it says "There were errors installing your software. Please try installing again." I have tried dragging the Aperture icon from my backup on an external drive but it says "The Finder cannot complete the operation because some data in "InfoPlist.strings" could not be read or written. (Error code -36)." Any suggestions on what to do?