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UPGRADE TO NITRO PDF PRO 14 but getting "We were unable to validate your serial number."

Sean Crothers

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Sean Crothers

Nitro Team,
I have a 2 licences for Nitro Pro 13.  I'd like to upgrade to Nitro 14 but recieve this message from the upgrade site:

"We were unable to validate your serial number."

Additionally I'd like to transfer one license to a new computer.  I've alreadey 'deactivated' license on the 'old' computer.



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Sean Crothers

Hello Team Nitro!

I need assistance for upgrading from Nitro Pro 13 to Nitro Pro 14.

After enter my serial # on the Upgrade Page, I recieve this error message:

"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 upgraded to Nitro Pro 13 in February 2022 (two licenses).

Thank you for your time,

Sean Crothers


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  • Official Nitronaut
Allain Umailin

Hello @Sean Crothers,

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

To further assist you, could you please provide the serial number of your Nitro Pro 13?

You can send the details of the license in this post so it will be visible to all the moderators. Rest assured we will hide the serial number before making the post visible to this thread.

Thank you very much in advance and I am looking forward to hearing back from you. 

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  • 2 weeks later...
Sean Crothers

Greetings Allain!

Just want to 'close the loop' with you...

I was able to successfully my two licensed copy of Nitro Pro to 14.  So far, so good.

Thanks much!


Happy Holidays! 

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