Acrobat DC Serial number

Attention all Adobe gurus,

I purchased Adobe Acrobat DC 2015 and had the program on my computer.  I installed it on my solid state hard drive.  I did a little bit of pdf manipulation but nothing major.  Fast forward my SSD was too small and I had a friend of mine put in an additional 1 Terabyte SSD.  The program is still on my computer but now for some reason it wants the serial code when I try to open it.  I have the program still installed on the smaller SSD is there a way to recover my serial code as I don't remember what my serial code was.  I am probably out of luck but I thought this was the place to ask.

Thanks, H