I have a Captivate License from March 2021.
I sign in to the Adobe Captivate App.
Then a pop up appears. It says Terms and Conditions Update. Learn more. (no where else to go so I click Learn More.)
The link takes me to the Adobe website and is asking me to download a trial version. I don't need the trial, I have the subscription.
You don't tell if you signed up for a subscription license or bought a perpetual license, which is still possible.
Anyway, install the trial version, while logged in with your Adobe ID. If you have a subscription license your ID will be recognized and the license will be validated. For a perpetual license you got a serial number which you may enter to validate.