Scholiast Posted January 11, 2020 Report Share Posted January 11, 2020 Sorry to trouble you. I have a valid copy of Nitro Pro 12 and serial number (and I love the program - recommend it to everyone in my school). I downloaded and tried to install Nitro Pro 13 but I keep getting a message saying that my license is not valid. I am not even sure if I am eligible to upgrade. May I please ask if I am eligible and/or help me to activate 13? Thank you so very much for the help. Link to comment Share on other sites More sharing options...
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