Alexvb Posted November 16, 2019 Report Share Posted November 16, 2019 Hi, I would like to upgrade from Nitro Pro 10 to Nitro Pro 13. I would like to receive the upgrade discount, but I received this error. I entered the correct Nitro Pro 10 serial number. PLease help. 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. Link to comment Share on other sites More sharing options...
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