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Unable to Activate Nitro 13

William McManus

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William McManus

My Nitro 13 Upgrade has been working fine since I upgraded in March 2021, but yesterday began to crash whenever I opened a PDF. Today I noticed that it was somehow not activated, but when I attempted to activate I received the message, "Invalid Serial Number." I have another copy of Nitro Pro 13 that is working just fine on another computer.

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  • Official Nitronaut

Hello William,

Thank you for contacting us - I'm happy to assist you.

Please get the latest version 13 installer from this page: https://www.gonitro.com/nps/product-details/downloads
After installation, you can activate by opening Nitro, click on the Help tab > About Nitro Pro > Activate and enter your serial number.

I released your serial number so you can reactivate. Can you please try again and let me know how that goes?

I hope this helps. Let me know if you require anything else.

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