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Licence Activation

Hannah LCP

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I am having difficulty activating my licence.

My serial number is 234600-xxxxxx-yyyyyy.

I uninstalled the current version of Nitro Pro from my computer and rebooted the machine. I downloaded a previous version of Nitro Pro by following the below link:


I checked prior to the download that the machine is using 64-bit.

I have tried to activate my licence however I still receive the following error message:

Error 22 - wrong licence number - you have attempted to activate with a serial number from a previous version... 

Any tips?

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Allain Umailin

Hello @Hannah LCP,

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

In order for me to further assist you with your concern, could you please send me a private message and provide the serial number of your Nitro Pro. This matters because our business installers are different from the online ones.

To send me a 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. 

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