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. 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 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 9 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.