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Upgrade from Nitro 11 to 12


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Hi there,

when trying to upgrade von Nitro 11pro to Nitro 12 I always get this 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."

Please help to fix this issue.


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  • Official Nitronaut
Allain Umailin

Hello @pejot,

Thank you for reaching out to us through our Community Forums!
I just made an adjustment on your license, kindly access our Upgrade Portal https://www.gonitro.com/support/upgrade and enter your Nitro Pro 11 serial number. You should get a message saying 'You’re eligible for a discounted upgrade to Nitro Pro 12' then click Proceed to Checkout.

Please be aware that payment information are needed in case you want to purchase additional item such as a Back-up CD. Once done, you should receive an email confirmation with the new serial number.

Then you may download your Nitro Pro 12 using below direct links instead:
x32 http://install.nitropdf.com/professional_1200112/en/burn/nitro_pro12_ba_x86.msi
x64 http://install.nitropdf.com/professional_1200112/en/burn/nitro_pro12_ba_x64.msi

If you are not sure which to pick, this will help: http://kb.gonitro.com/knowledgebase#/search/64/000001874

Before you upgrade to Nitro Pro 12, please remember that this build installs over your existing Nitro Pro so take note of the following:
a. Back-up your stamps/QuickSigns by referring to this article:

b. Your Quick Access Toolbar (QAT) will not be migrated. Refer to this article to recreate them: http://kb.gonitro.com/knowledgebase#/search/qat/000001989

After installation, you can activate by opening Nitro Pro, clicking on the Help tab > About Nitro Pro > Activation and entering your NEW serial number.

Thanks for choosing Nitro Pro and I hope this helps!

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