XCode 4.6.3 crash everytime I open it on OS X 10.9.3

Question

I updated Mavericks 10.9.2 to 10.9.3 and downloaded Xcode 6 beta. One of my project is still in Xcode 4.6.3. So now whenever I open this project Xcode crashes with the following

Answer 1

Try this:

sudo mv /System/Library/PrivateFrameworks/MobileDevice.framework{,-saved}