Sage 50 2013 Update 1 has been released. If your program version number is currently 19.0.11.261
or less you need to apply this update. Please check this in Help->About.  You  can download the executable file for Update 1  from here.

Before applying the updates, backup your Sage data. Exit Sage and Microsoft Excel.

Your version number should now be 19.00.11.0263