I purchased perpetual license to this software (NitroPDF) and the version I have continues to suit all my needs. I began to have problems when I updated to Win10 as the installation would no longer work. They refused to help at that time. I got around this problem by updating to Win7 first, installing the SW and then migrating to Win10. Now I am moving to another computer and when re-installing the SW it goes fine (maybe Win10 improved compatibility), except the required server activation is now no longer maintained by the SW company and there is no way to activate my legally purchased SW. Their position is you buy a new copy for a much higher price than it was when I purchased my existing copy.
They have effectively stolen from me the ability to use SW I had a perpetual license to use. How is this legal?
From their web site: "If you're on Nitro Pro 12 or an older version such as Nitro Pro 11, Nitro Pro 10, or Nitro Pro 9, you might run into an instance where you're not able to re-activate your software (Error message "There was a connection issue."). This is because our activation servers no longer support older versions of Nitro Pro so your software needs to be upgraded to either the latest build of Nitro Pro 12, or to Nitro Pro 13."
This would be fine if they don't want to maintain the license server and they offered reasonable terms for existing users to update, but they do not.