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Error 23 when i try to activate my licence of Nitro Pro 11

Carlos Maia

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Carlos Maia

Once you click “Deactivate”, you can activate your license immediately by entering the below serial number into Nitro Pro.

I have made this procedure but thay say the same error 23


Number of Activations



Number of Activations Allowed



What can i do for activate again my licence?


Thank you


Carlos Maia


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  • Official Nitronaut

Hello Carlos,

Thank you for posting on our Community Forums!

Please note, we no longer support Nitro Pro 11. It has been discontinued as documented in our Sunset Policy: https://www.gonitro.com/nps/product-details/sunset-policy

Please install Nitro Pro 12. Note, that it should be version 12, not 13: https://www.gonitro.com/nps/product-details/downloads

Then activate with your Nitro Pro 11 serial number: 

I hope this helps. Let me know if you require anything else.

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