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Unable to Upgrade


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I am currently running and wanted to upgrade.  But when I put in the serial number it says unable to validate.  I can provide the serial number if needed or am I not eligible to upgrade this version?

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Joseph Capiral

Hi @lsteinbrenner

Thank you for reaching out to us through our Community Forums.

I understand you are having issues upgrading your Nitro PDF Pro 12 serial number due to an error.

I apologize for the inconvenience and please message me the serial number that you have to check if the serial number is eligible for an upgrade.

Thank you. 


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Stefan Phillips

Same here... I get the following message trying to upgrade from Nitro PDF Pro 13:


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.


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  • 3 weeks later...

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