Serial number for Adobe Acrobat Reader DC

Hello,

I am trying to install Adobe Acrobat Reader DC on my computer (Windows 10) and apply the serial number for the license certificate purchased.

I successfully downloaded the program, but I'm not able to apply the software license certificate anywhere that I can find.

Note: I had purchased two licenses and both were installed on two different computers a couple months ago. However, one of those computers doesn't exist anymore, so I'm trying to use the second license on another computer instead.

Thank you!