Xcode 5.1 won't launch -- "being updated" -- but already installed trying to launch Xcode 5.1 and keep getting "Xcode is being updated". It was updated last week and shows as installed. Screen shots to illustrate. Any ideas? I went to the developer portal, but it takes you to the App Store (I was hoping there was a seperate install). Many thanks. Project is stuck at the moment.
Show the App Store's Debug menu (enter the following in Terminal):

defaults write com.apple.appstore ShowDebugMenu -bool true

Select Reset Application and restart the App Store


Log in to the App Store through the Purchases tab.
Reboot.