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-23 License Activation error


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I had to reinstall mu Nitro Pro Productivity suite v12 on my laptop. After deactiving my license through the 'license portal' itried reinstalling and received a -23 error. I tried an offline activation, but to no avail, received a process unsuccessful...'License Key already used' error.

Now the license portal shows that i can 'deactivate 0 devices'  although number of activations is zero and activations allowed is 2.


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  • Official Nitronaut

Hello @Milos,

Thanks for reaching out!

Please send me the serial number via direct message so I can check this for you.

I couldn't locate it using your email address.


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  • Official Nitronaut
Allain Umailin

Hello @Chick,

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

Please note that every forum posts has to be reviewed to hide sensitive information from public viewing.

To further assist you, 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.

Thank you very much in advance and I am looking forward to hearing back from you. 

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