jcmj Posted March 24, 2022 Report Share Posted March 24, 2022 Hi Team, I currently have Nitro Pro 9 on my machine with a serial number ( I can see the serial number when I click on Help->About Nitro Pro). I would like to upgrade it to newer version. When I click on check for updates, it throws error "problem connecting to update server". I did go through the forum on similar threads, where it was recommended to install v12 first and use the serial number to activate and then upgrade it to v13. While doing so the serial number is not being accepted for v12 activation. Kindly help. Thanks Jay Link to comment Share on other sites More sharing options...
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