AudioUnit Manager is a utility that enables the user to specify subsets of AudioUnits to be loaded with particular hosts. AudioUnit Manager provides a simple way to organize AudioUnits into sets so users can load just the AudioUnits they need for a particular application. This can mean accelerated application launch times and exclusion of incompatible AudioUnits for some hosts (e.g. Pluggo and Final Cut).
AudioUnit Manager works much the same way that the Extensions Manager control panel or the Pluggo Plug-in Manager did back in OS9. The web page claims that AudioUnit Manager is “able to specify subsets of AudioUnits to be loaded with particular hosts”. This really means that it is scriptable so that you can create AppleScripts that change the plugin set before launching the desired application.