My answer regarding prefs is correct above: The Preference Reference describes how to turn off EchoSign features. See http://www.adobe.com/devnet-docs/acrobatetk/tools/PrefRef/Windows/Feat ureLockdown.html#SigningwithEchoSign.
You can also use the master key to turn off all services. You cannot at the moment get rid of the items under File.
Ben