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Cannot validate serial number


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Hi verybody

I downloaded the 13 Nitro Pro version and installed but when asked for the serial number I introduce the old one but don't works.

What can I do ?



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  • Official Nitronaut

Hello @rafael_carbonell

Thanks for your message - I'm happy to assist you.

Your serial number is for Nitro Pro 12, please uninstall what you have and get the correct version 12 installer from the page below:

After installation, activate with your serial number.

If you wish to upgrade to version 13 instead, please proceed to the following web page,


Enter your serial number and follow the prompts to receive a new Nitro Pro 13 serial key and installation files.

I hope that helps!

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