Hello bronzeagle,
Thank you for your reply.
What I mean is when app updates are available the store tile shows the number of updates available in the home screen, and/or when you open the store you get a notice at the bottom stating xx updates available. I do not see these notifications anymore in either place, so I have no idea which apps have been updated!
I do use the Lumia System Updater, but it is mostly for system and Nokia apps, and its has to be done manually. It does not work with regard to the normal apps for which I seek update notifications.