Mark Sanders Posted December 11, 2021 Report Share Posted December 11, 2021 Hi Nitro Pro Your knowledge base article at https://kb.gonitro.com/knowledgebase#/answers/Nitro Pro/000004327 says "The '-24 Error - Invalid license number' messaging will appear when attempting to activate Nitro Pro 6 - Nitro Pro 220.127.116.114. As of April 1st 2021 our activation servers for the aforementioned versions of Nitro Pro were retired. All active 18 Digit Serial Numbers originally provisioned for these older versions of Nitro Pro were given an upgrade and can now be used with Nitro Pro 18.104.22.1684. " I have a valid license for Nitro Pro 10 but was getting an error message when I tried to activate the software after reinstalling it. Having read the above knowledge base article I downloaded and installed Nitro Pro 22.214.171.1244 and successfully activated it with my Nitro Pro 10 serial number but the advanced features aren't activated so I can't use them. Please can you advise how I can activate the advanced features such as review, erase, and protect? Link to comment Share on other sites More sharing options...
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