I paid for php ed pro, far short of my guaranteed 14-day trial ... now what? Am I supposed to get a new license key? I'm seeing nothing along those lines. How do I turn this thing back on? What did I pay for?

As paying customer you should have received instructions for your Member Login at www.nusphere.com. Once logged in, you can download the latest version of the software and view your license key. If you did not receive such any emails, it probably got trapped in your spam filter. I suggest you contact NuSphere support for assistance at http://shop.nusphere.com/contact_us.