I have angry birds on my MBP. It's one of only 3 or 4 games I have allowed my son to download onto this thing. Every time there is a upgrade for OSX or anything else, angry birds also shows an update. When I click the update button, it asks for my itunes login and then tells me it's wrong. So AB is always on the update list with no way to update it. I have tried deleting it, and re-downloading it a couple times with no luck. Need to mention this started on a 2009 MBP and continued after I bought a 2013 MBP-r and re-downloaded my apps. Any idears?