Getting a download for the second time

It won't be on the Adobe general website.  Instead, go to your adobe account, log in and click "products" on the left side of the screen.   You should see a list of what you've purchased and the serial numbers.

https://helpx.adobe.com/manage-account/using/access-adobe-id-account.html

Go here for SOME older links https://prodesigntools.com/adobe-direct-download-links.html
Prodesigntools is an official Adobe partner, and the links go to Adobe, not a 3rd party site
.
Computer crashes happen... when you download a program make an external copy
IF/When you do have a download, be sure to copy it to AT LEAST one external device
you should ALWAYS keep a copy (or two!) on an external device
since Adobe DOES SOMETIMES REMOVE OLD VERSIONS FROM THE SERVER
a usb flash drive or external hard drive, or write to a CD or DVD
plus a text file containing your serial number if you have a serial number program