If you choose to upgrade to Nitro PDF Pro 13, please visit our site and we will provide you with your new serial number. If you have trouble finding your original serial number, please visit our Knowledge Base for help.

Your new license will use the original serial number for its activation. If you choose to upgrade to Nitro PDF Pro 12, please visit our downloads page and install Nitro PDF Pro 12.16.9.574. This upgrade can be run on top of your already installed license of Nitro PDF Pro. If you're an individual user, you will have an option to either upgrade to Nitro PDF Pro 12 free of charge, or to upgrade to Nitro PDF Pro 13 for a discounted price.

This is because our activation servers no longer support older versions of Nitro PDF Pro, so your software needs to be updated to Nitro PDF Pro 13 or to the latest build of Nitro PDF Pro 12.

If you are on Nitro PDF Pro 12 or an older version such as Nitro PDF Pro 11, Nitro PDF Pro 10, or Nitro PDF Pro 9, you might not be able to re-activate your software (Error message “There was a connection issue”). Why do I get an error when trying to activate Nitro PDF Pro?

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