Maheshwar Dutt Sharma Posted April 20, 2021 Report Share Posted April 20, 2021 I upgraded from NP 11 to NP 12 with a serial number from the past version of NP 11. To remove the error 401, I uninstalled NP 12. After that it requires new activation and the old serial number is not valid. Please help. Link to comment Share on other sites More sharing options...
Official Nitronaut Allain Umailin Posted April 20, 2021 Official Nitronaut Report Share Posted April 20, 2021 Hello @Maheshwar Dutt Sharma, Thank you for reaching out to us through our Community Forums! In order to further assist you, could you please provide the serial number of your Nitro Pro 12 To send it via private message, hover your mouse on top of my name 'AllainU' and select 'Message'. Thank you very much in advance and I am looking forward to hearing back from you. Link to comment Share on other sites More sharing options...
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