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Otherwise, we recommend utilizing our Knowledge Base site and to post your inquiry to our Community Forums (a page where other customers and Nitro Support team can collaborate and share solutions). Please be aware that our ticketing system is the fastest way we can communicate with our customers with Nitro VIP Access (formerly Software Assurance). Hello you for reaching out to us through our Community Forums! Thank you for choosing Nitro and I hope this helps! However if you prefer working with an older version and as a courtesy, I just made an adjustment on your license, so you can now activate your copy of Nitro Pro by going to Help tab > About Nitro Pro > Activate, entering your serial number and clicking Activate. 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 VIP Access, kindly access our Upgrade Portal and enter your Nitro Pro 10 serial number: With that, support for the discontinued versions are no longer available. Before continuing, please be aware that Nitro Pro 11 or older are already discontinued as documented in our Sunset Policy.
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