I, too, get an error message about the serial number being incorrect. I did receive the email with my user ID and the serial number. I am familiar with their “unusual” method of registration, and I did not see anywhere to enter my ID this time. When I start the software, I get the trial screen and the area to enter my serial number for activation. When I enter it, I get the message that my serial number is incorrect, and a note that the serial number can also be used for the professional version of the software. Is the link on SOS to the Standard or Pro version? What is the solution to the serial number problem? If I proceed with using the trial version, it works fine, but does show that it is a trial version.