In a fresh install, I cannot get the PMS Enhanced tab to show on the profile page. I have published the plugin and the tab in CB. No matter what location that I designate for the tab, it will not show up on the profile page.
The tab name is Quick Message. If you publush it (and the plugin is also published) then when you visit someone elses plugin you will see a quickmessage box where you can type a message and send it with one click.