Hi davidf94648170,
I can see that you have purchased upgrade for Acrobat Pro DC.
You can download Acrobat Pro Dc from this link Download Adobe Acrobat products | Standard, Pro | DC, XI, X& then activate it using the serial number of the upgrade plus the seriel number of your previous Acrobat version (Acrobat or Acrobat XI).
Regards,
Aadesh