Installed the CCCRCS on a WP 3.5.
I do get the button and can add the classes from the pop-up (ie left-column and right column), but it seems they don't do anything to the layout.
I see the classes added in firebug, but the layout itself does not change.
It used to do that, didn't it? Would be SO great if this plugin got updated to 3.5 :)