When I tried installing it again, I still received the same expired message, but when I tried the Mirror site download 4,314 KB, it worked perfectly and gave me an Activation window with the License number I had to enter in the program. That install also prompted a message from my firewall saying the program had changed, so the Mirror site either has an older or newer version available.
If you try it that way and you might get this to work properly. Again, this is the download from the mirror site and it is a different size then the original download. Now I did notice that even though I entered the license number and closed the application (as recommended to save changes), that when I started the program again and checked under registration, the license number was NOT showing. I am not sure if that makes a difference since it does not say Trial version anymore, but I though I should mention it.
Another thing to mention is that I just ran the Premium Booster program and it found 192 errors. I use CCleaner, a great freeware program and just ran it yesterday, and again, after running Premium Booster, but before making any changes suggested by Premium Booster, and CCleaner only found one problem; quite a difference.
I have been using CCleaner for a while now, without problems so I trust it, and it gets very high reviews so I am going to stick with that.