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I am trying to activate an install on a new PC - License does not exist.

David Carr

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David Carr

Hey support,


I am inputting my license number being, and the software is saying it does not exist. I have deactivated this other install. Please assist.



David Carr

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  • Official Nitronaut

Hello @David Carr

Thanks for your message - I'm happy to assist you.

The error message means that the serial number you are trying to activate is for a different version of Nitro PDF Pro.

Your serial number is for Nitro PDF Pro 13, please uninstall the version you installed.
And then get the correct version 13 installer from the page below:

After installation, activate with your serial number.

Please let me know how that goes.

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