I just upgraded to SketchUp Pro 2017. There was no charge. I was given a new Serial Number, but not a new Authorization Code. When I entered the new Serial Number and Old Authorization code, it gave me a link to check My License information which is what I entered that I got from the web page. When I did that it repeated that I needed to get a valid Serial number. I repeated those steps several times and it did not validate my new Serial Number.
What should I do?