Sage 50 2012 Update 1 has been released. If your program version number is currently 18.0.11.209 or 18.0.10.208 you need to apply this update. Please check this in Help->About. Otherwise you do not need to run this update. You  can download the executable file from here.

Before applying the update, backup your Sage data.

Your version number should now be 18.0.12.220.