How do I transfer the Adobe Acrobat XI Pro to a new computer?

I downloaded Adobe Acrobat XI Pro from the internet last week and I am changing computers in my office today.  How can I transfer this program to my new computer when the program did not give me an option to SAVE it when downloading it?  I really want to use it on my new computer and do not wish to purchase it again since no one will be using the old computer after it is switched out.

Thanks for your help.  Michelle