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NP stopped working on Win 10 - "liscense espired" -???


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Howdy All,

I've been using NP for a couple years but suddenly one day I get a message stating that my NP license has expired.  When I tried to activate NP with my Serial Number it states "You have reached the maximum number of installations for this license".  Nothing has changed on my PC.  I have NP on a desktop and my laptop, but this has not changed for at least a year.

So, why suddenly this issue, and how to fix?



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  • Official Nitronaut
Allain Umailin


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

Please provide me the serial number of your Nitro Pro so I could check the status of your license.

And also, please answer the following for me to properly assist you:

-What OS is installed in your computer (whether it is 32-bit or 64 bit)?
-What build of Nitro Pro are you working with? You can find this out by clicking on 'About Nitro Pro' under the Help tab (format is 11.X.X.X)
-When did it start happening? Any changes you're aware of before this happened?

Happy new year and I am looking forward to hearing from you soon.

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