Adobe Pro Student Teacher Edition - 2017

I have the 2015 version of Adobe Pro.  I purchased it, and have both the disk and the serial number.  The computer that it was originally on has died and I would like to now install it on my new laptop.  My new laptop does not have a disk drive.  How can I install this on my new laptop?  I download the trial in hopes that when the trial ended it would ask me for the serial number so that I could continue using the product that I have paid for, but it only gives me the option to repurchase.  Thank you for any suggestions!