It works but the "capability counter" shows more capabilities than it will reveal to you when editing.
For example, the Contributor Role normally has only three capabilities but the counter shows "5". When you edit the capabilities, the counter suddenly jumps by a number that doesn't correspond to what you added or removed.
The developer was disinterested in properly explaining this behavior to me and seemed annoyed by my question. He ignores all support requests posted here and instead expects users to join his private forum for an annual fee. Sorry, not after the response I received from him.
I removed this plugin and installed "Capability Manager Enhanced" which is much better organized.