Could you explain a little bit on what exactly is outdated? Is it your installation packages for clients?
If it's your clients, a new package can be created fairly easily. Just open ADNM and log in.
Once you're in, go to the left pane and click, "Installation Packages." A list of your packages will now show in the right pane. If you would like to create another, just right-click in an open area in the right pane, and click "Create Package."
You can give it a friendly name, so you know what package it is, such as "Desktop Client - Spanish Lang" or "Server Package". Then, pick "Netclient" or "Netserver" in the drop down box, and click edit. From that point, you will be able to add or remove properties from the install package, such as skins, available plugins, or languages. Alternatively, you could use your own Admin.ini or Tasks.xml files. Once done, just click Ok, and you will see your new package in the list.
However, this package is only for new computers that need avast installed, because they don't have it yet.
If you want to update your computers that already have avast installed, then all you need to do is schedule an update task to do so.
If the ADNM console is outdated, Just go to add/remove programs on the server computer that is running ADNM, and click "Change / Remove" on the Avast Management server. You can then choose to "update" the ADNM from there.
Hope this helps!