I have nitro 12 pro.

[Aaron Wells]

I have my serial number. Where can I download nitro 12? How can I activate? Please help. This is extremely confusing

[Allain Umailin]

Hello @Aaron Wells,

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

To further assist you, you may use the following direct MSI installer links to install Nitro Pro 12.16.9.574:

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 

4. After installation, you can activate by opening Nitro Pro, clicking on the Help tab > About Nitro Pro > Activation and entering your serial number.

Thank you for choosing Nitro and I hope this helps.