When viewing the local archive in the Infrastructure Manger, you can right-click and from the Internet Archive Mode option in the menu, you can choose GA or beta. If you choose beta, it will treat the beta versions of the probes on the Internet Archive as the current versions. Then any of the probes you have in your archive that are not up to the beta version will be highlighted as having a new version available.
In this mode, I do not think you can tell the difference between a GA probe that is still the latest version and a beta probe that is already downloaded. If the Infrastructure Manager sees that you have the latest version available of GA or beta (when running in beta mode), I think the icon stays light green.
-Keith