do know how to get updates for LDD?
I think you can download the newest version here
There is actually one newer version then 4.3.10 but it can only be reached by a link (not sure why).
If I remember correctly, all you have to do is download the latest version LEGO released (4.3.11) and run the installer (should simply add anything missing from your current version). I should note that LEGO will not be updating LDD beyond the version linked below.