Hi Michael,
This is a very strange error. You need no more activation codes at all, since you are a commercial user. Your .pixinsight-license file should allow you to run any new versions without problems.
I'm going to generate new activation codes for you, which I'll send to you by email. This will allow you to run the application. I'll also ask you to help us in knowing if we have a bug in the application that is preventing correct installation of new versions.
I apologize for the inconveniences.