Ruckus DeWhitte Posted November 15, 2021 Report Share Posted November 15, 2021 Hello, I'd like to upgrade my Nitro PDF Pro License from version 12 to version 13. When I enter my serial number in the online upgrade tool, I receive an error message: Quote We were unable to validate your serial number. Please ensure you entered it correctly. If you believe you are eligible for an upgrade, please leave a post on our Community Forum and update us with your issue. I have the serial number and reference number from my original order several years ago. Please let me know what else is needed from my end. Thank you. Link to comment Share on other sites More sharing options...
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