Hi John
It is nice to see you here (although, not in the Bugs section
).
As a starting point, uninstall everything, and go to your personal folder ( C:\Documents and Setting\<user> ) and delete the .pixinsight-licence, if exists. Restart the computer (just in case). Now, install the application, from the "-c" file you downloaded. Launch the core program, enter your id and activation code.
If this doesn't work, there might be a problem in our databases... Juan will check that everything is fine.
BTW, did the trial version work properly?