How can I recover an old Adobe Acrobat Standard license and serial number that no longer appears in my Adobe account?

Hello,

I am trying to identify and recover an old Adobe Acrobat Standard license that I used for many years.

My Adobe account is very old and still active. I have a saved copy of my “My Adobe” account page dating from 2013, so I know I was already using this Adobe account at that time.

I remember downloading Acrobat Standard from Adobe, and I never had a paid Acrobat subscription. More recently, Acrobat was installed on my Windows computer under:
C:\Program Files\Adobe\Acrobat DC\Acrobat\Acrobat.exe

Today, when I sign in to my Adobe account and open the Products page, no registered product is shown. The page only offers me the option to enter a serial number. Unfortunately, I no longer have that serial number, and I have searched my old files and backups without finding it.

Is there any way to determine which version of Acrobat Standard I owned, what type of license it was, and whether Adobe can recover the old serial number or activation/registration history associated with my account?

I am trying to recover or identify my existing old license, not purchase a new subscription.

Thank you for your help.