It seems that Apple removed the QT 7.0.4 updated. Instead it was posted a reinstaller to 7.0.1. Indeed, firstly I updated to 7.0.4 and it crashed when I was trying to quit.
Here you can find the reinstaller.
http://www.apple.com/support/downloads/
Here you can find the reinstaller.
http://www.apple.com/support/downloads/