goldpan 0 Report post Posted February 26, 2018 Hi everyone. I have a very old version of nitro pdf that ran on my old laptop with a microsoft windows vista operating system. The old version of Nitro pdf is 5.3. I am the original owner and I do have the original CD desk with the serial number. I put in the serial number to upgrade but got a message that said something like " go to the forum for help. " But after reading some of the help topics and answer I did not see or read anything that would help me. I have a brand new laptop computers that has a windows 10 operating system. How can i upgrade to the latest version of Nitro pdf without paying the new customer retail price. Your help with this issue would be greatly appreciated. Thanks Quote Share this post Link to post Share on other sites
Mario K. 0 Report post Posted February 26, 2018 @goldpan Unfortunately, there is no way to upgrade to version 11 without paying the new customer retail price. If you check our upgrade page, https://www.gonitro.com/pro/upgrade, Nitro Pro 8 or older versions users pay full price. Quote Share this post Link to post Share on other sites
