Texasbrit doesn't know what he's talking about. The CE beta firmware only downloads if you are specifically setup for it. Updating firmware is standard procedure on any install and only downloads the most current non-beta version. If you have at any point done a search for "iamanedgecutter" then you will always have beta firmware but I doubt that is the case. If it is, you might wan't to disable CE. If it forced the beta-version to download, everyone would be stuck with beta because we (field technicians) run it on every install.
Most likely, you do have the current firmware though because the IRD will update itself on its own after some time.
The answer to forcing a firmware to the clients, is that you can't. When the clients realize that the Genie has a different firmware, they will then update to that same version. Almost everything you see happening on a client is actually taking place at the Genie (Server).