-20 Error Invalid License Number

[Andrew Sanford]

Hello,

I had to uninstall my copy of Nitro Pro and when I go to re-install with the license number, I get a -20 Error Invalid License Number and that it doesn't exist.  Please let me know what steps you would need me to do.

[Allain Umailin]

Hello @Andrew Sanford,

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

To continue offering our customers the very best PDF tools, we have upgraded our servers and has shutdown the one your older version of Nitro Pro runs on so please install Nitro Pro 12.16.9.574 using below direct MSI links:

x32 http://install.nitropdf.com/professional_12169574/en/retail/nitro_pro12_ba_x86.msi
x64 http://install.nitropdf.com/professional_12169574/en/retail/nitro_pro12_ba_x64.msi 

To know if you have 32-bit or 64-bit, please refer to this article:
https://support.microsoft.com/en-ph/help/15056/windows-32-64-bit-faq 

After installation, you can activate by opening Nitro Pro, clicking on the Help tab > About Nitro Pro > Activate by entering the same serial number.

Thank you for choosing Nitro and I hope this helps.