Hello
Have you tried removing iTunes since the Archive and Install, and then download and install iTunes again?
Make sure iTunes is closed - Go to Applications folder in finder - Drop iTunes App in Trash, Empty Trash, Restart Mac
-Download iTunes
http://www.apple.com/itunes/download/
-Launch iTunes
*The following article assists with full removal of iTunes components, Before doing this you will want to ensure all your music is properly backed up. iTunes content is typically stored in the Music folder - iTunes - iTunes music. If you have the ability. Backup your entire iTunes Folder.
Back up your iTunes library by copying to an external hard drive
http://support.apple.com/kb/HT1751
How to back up your media in iTunes
http://support.apple.com/kb/HT1382
Removing iTunes for Mac OS X
http://support.apple.com/kb/HT1224