Hi stuckboss,
thanks for your answer. Unfortunately that did not help.
I have downloaded the version you said and I have uninstalled iCloud from my desktop. After reinstalling iCloud and restarting the computer I have the same problem as before. Apple Software Update (ASU) finds the same version to update I have installed.
This did not happens for iTunes. This program is up to date and ASU brings me not the same version to update. In my opinion there are some files that won't be deleted by the installation tool. And this files have a fewer version number, so ASU gives me the opportunity to update to a version I still have.
Have you any information about a tool, that will be delete all files installed by the installation tool of iCloud? Something like a "Microsoft fix-it"? ;-)