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Trouble Activating License

Mitchel Laman

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Mitchel Laman

Good afternoon. I'm trying to reinstall on one of my users' computers from an issue with multiple monitors. The license I have reads it is for version 12 and is showing 0 active with 2 available to activate.

The message is reading:

-22:Error - Wrong license number

You have attempted to activate Nitro Pro with a serial number from another version.

You can only activate this version of Nitro Pro with its matching serial number.


Can you assist pointing me to the correct version. I have tried version 10, and 13, and the activation for this license says version 12 and that is the version I am trying now with the current message.


Thank you for your assistance,




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Reymund Oyong

Greetings @Mitchel Laman

Thank you for reaching out to us through our Community Forums!

If the version of your serial number is 12, please ensure that you install so you could successfully activate. 
You can check the version and build of your installation under the Help tab > About Nitro Pro. 

If your installation is not on, please uninstall then install by downloading the installer from the link below:

https://www.gonitro.com/product-details/downloads - click the 'Download Nitro Pro 12' link.  

Once Nitro PDF Pro is installed, you can activate by going to the Help tab > About Nitro Pro > Activate. Enter the serial number then click Activate. 

Kind regards, 

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Mitchel Laman



We uninstalled the version we had and reinstalled using the link you provided. We didn't even have to enter the activation key - it must have remembered from before we botched the installation.


All is working as expected now, thank you for your quick assistance.





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