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Activation error # -23

michael dorosko

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michael dorosko

I am getting the error message -23: Error - License number already used on my laptop. It was originally downloaded on my desktop and I am trying to switch it to my laptop instead. I deactivated it on the desktop through nitro, manually, and even entered the serial number on the https://licenses.gonitro.com/portal page and it shows that there are 0 activations and 2 activations allowed. 

Is there a way that you can fix my serial number so I am able to activate it on my laptop, as something must be wrong on the other side of it. I did all the steps it told me to do and still nothing.


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Allain Umailin

Hello @michael dorosko,

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

I just made an adjustment on your license, so you can now activate your copy of Nitro Pro by going to Help tab > About Nitro Pro > Activate, entering your serial number and clicking Activate.

Thanks for choosing Nitro Pro and I hope this helps!

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