To continue offering our customers the very best PDF tools, we’re upgrading our servers and subsequently shutting down the one your older version of Nitro Pro runs on so please install Nitro Pro 12.16.9.574 using below direct MSI links:

However if you prefer working with an older version and as a courtesy of being a valuable customer of Nitro, we want to make you aware of an upcoming change to your product that may affect its performance. You can find out more about these fixes here: In addition to that and many other feature improvements, version 13 also contains some important security vulnerabilities fixes that you might want to consider when deciding whether to upgrade to it or not. Please be aware that the issue of license reverting to 'Trial Expired' when a major Windows Updates was installed and generating null-id (Computer ID of all '0's) has been fixed in version 13. You should then receive an email confirmation with a new serial number to activate Nitro Pro 13 and to know more about some enhancements and fixes with Nitro Pro 13, please visit our Release Notes page (Premium Support is prioritized ticket support with our Technical Support staff/Nitro Customer Success and Service Team for one year after the purchase date). You may also want to purchase Nitro VIP Access (formerly Software Assurance) that entitles users to free upgrades for the next release of Nitro Pro and Premium Support for one year after the purchase date.

If you are interested in upgrading your license to Nitro Pro 13 with a discounted rate, kindly access our Upgrade Portal and enter your Nitro Pro 11 serial number: With that, support for the discontinued versions are no longer available. P lease be aware that Nitro Pro 11 or older are already discontinued as documented in our Sunset Policy.

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