Xcode 5 upgraded , stuck at Xcode 4.6.3 I upgraded my Xcode 4.6.3 to Xcode 5 on app store but when the upgraded is finish and open my Xcode it is still Xcode 4.6.3, it should be Xcode 5? What is the problem here.
Found at /Developer, I found a way to uninstall Xcode via

$ sudo /Developer/Library/uninstall-devtools --mode=all


I just ran the installer for Xcode 4, and it detected old version of Xcode, offering me to move it to /Developer-old.