I am running windows 7 professional and I am unable to launch LR5. It seems that when I initially installed LR5, the trial countdown began. I never selected the "I want to try LR5" option during installation. Why would I? I entered the serial number I purchased. Every subsequent LR5 launch brought up the registration/licensing window, which I thought was strange but there it was, the countdown. I paid no mind to it but after the countdown finished, I couldn't launch the application. What's up with that? Any help would be greatly appreciated.