Problem with App Store

I have a mid 2010 MBP on which I have installed Yosemite 10.10, the App Store badge shows I have one update available, it lists the available update as Apple Remote Desktop 3.7.2 but I know my MBP is already running 3.7.2, anyway I hit the update button and instantly get the message: Remote Desktop is already installed on this computer. Chose software update from the Apple menu to check for updates.
How do I clear this message, I have deleted the App Store preferences and restarted but it's still there.

You are far from alone in having this particular problem:
Apple Remote Desktop update issue in Yosemite
Apple has not yet provided a fix.
Waiting for the fix is likely the best strategy here.