I just installed a new hard drive onto my computer and restored my system from my time machine back up. Everything is working fine, except for all of my mac app store apps. I had call of duty 4 on my computer, and now the icon has an x through it and I can't find it anywhere. I also have many other apps from the store and they are all gone. Why are only the ones I downloaded from the store gone? Also can I get them back? I was really far in call of duty and I don't want to loose where I was at. thanks in advanced