ERA v2 & PCU

Can someone explain how the latest ERA handles the program component updates. I am currently using ERA's internal mirror function, i don't have a mirror setup on EAV BE. According to the manual, section 3.3.2, it talks about being able to enable program component updates and disabling them easily. I can't find the option for program component updates. I currently have 5 clients that are on 3.0.657 and would like to push out 3.0.669, but can't figure out how to do it, unless i use the Remote Install feature of ERA. I've already updated the install package.

It would be great if I could turn the PCU off, so that it gives us time to test when a new version comes out, then push it out automatically when we are ready, by changing the config on ERA.
The old way of doing this was to use ERA v. 1 and use the client as the mirror which gave you all the options necessary. ?