I have the latest adobe Air, the thing is that it doesn't updates other app's Like FontBook, which hase the version 3.0, but I have only the first version. Updating the air wasn't the issue, the issue is about the otrer app, who runs on Adobe Air.
I see. It's actually up to the application developer with how they want to update their app. Some use the built in update mechanism available in AIR, others do not. I'd recommend asking the FontBook dev if they have an update available. If it's supposed to be automatic, then it's possible that something is going wrong and we'd need to take a look at your AIR installation log to see if we can spot the problem.