Troubles install Xcode 5 on Mountain Lion A few days ago I started to download the new Xcode 5, but I canceled this update at nearly 40%.

Today I'm tried to download the update but it won't download. When I go to Mac Appstore, Updates it says "no updates available". I searched for Xcode in the Mac Appstore and on the Xcode app site there is the update button. But when I click on it Mac Appstore shows me up an dialog telling me 


  You have updates avaiable for other accounts. To update this application sign in to the account you used to purchase it.


I've never used another account to install Xcode. (Yes, I'm really sure.) I tried with log out and then sign in again in. I also tried the suggestion in this question: Why can&#39;t I install Xcode 4.4 on Mountain Lion?

Has anyone an idea?
I had a similar problem with one of the Xcode 4 versions.  What worked for me was to log in to Apple Developer Network (this will work with your free developer account login), at https://developer.apple.com/xcode/

Although that page says to get the most recent version of Xcode at the App store, there is a link that says "For past versions of Xcode or additional tools -- view downloads".


Click the downloads link
Unselect all of the checkboxes on the left except "Developer Tools", type "xcode" in the box at the top of the left column, and hit Enter
The top result will be Xcode 5 - click the disclosure triangle to view the download link for it.
Download the .dmg, double-click on it to mount it and run the installer


Note that the downloads page says that Xcode 5 requires OS X 10.8.4.

As I mentioned, this worked for me when the App Store locked me out with one of the Xcode 4 versions.  If this happened to you, please leave a comment indicating whether this solution works for you.