I'm afraid I seem to of run into the same issue aswell. The initial version (that I installed a couple of weeks ago) expired and so I downloaded the most recent version from the site. Installed, no change. Uninstalled and reinstalled, no change. I've not attempted to tamper with the date to circumvent expiration checks, so I'm not sure what's happened here.
Just thought I'd drop a line, so you know it's not just an isolated case. Was very happy with the program while it was functional, mind