Sage 50 2012 Update 6 has been released. If your program version number is currently 18.104.22.168 or less you need to apply this update. Please check this in Help->About. You can download the executable file for Update 6 from here. You must then restore this layouts only backup available from here.
Before applying the updates, backup your Sage data and layouts. Exit Sage and Microsoft Excel.
Your version number should now be 22.214.171.124.