The recent update to the plugin now requires one register with the author's site. Unfortunately, this does not seem to be fully-baked: I received an error after filling in the evaluation form, but got an email confirmation anyway.... except that the mechanism used to register didn't take and the plugin kept nagging me to register. Ugh.
I tried responding to the email address from the author's "registration" message, but that bounced with a fatal error. I wish I could find the older version as it worked.