Where can I find my license key?

I inherited a site from someone who is no longer around and I’m trying to clone it to a dev sub-domain for testing. However, I get a Dashboard error saying:

— Your s2Member Pro Add-on must be updated to v190822.
— Please log in at s2Member.com for access to the latest version.
— Or upgrade automatically using your s2Member.com username & license key…

Rooted around a bit in the various s2member screens but could not locate that key.

Hi Chuck.

You can find it in your Account page over at https://s2member.com/account/