I can't access Photoshop because of Creative Cloud

Several years ago, I purchased Photoshop software and had it installed on my computer. I was using it successfully and decided to try Lightroom, also. I downloaded Lightroom from the Adobe website and in order to use it, I had to purchase a subscription to the Creative Cloud Photography plan. The CC Photo plan included access to Photoshop, even though I already had the software. Now my CC Photo subscription is expired and I'm not using Lightroom enough to justify paying for it again. But now, when I try to access Photoshop, all I get is an alert that my subscription is expired. But I already own the Photoshop software!

This is frustrating because it's like my computer and/or the Adobe software the keeps me from accessing my apps is confused. Like it doesn't recognize that there is Photoshop software on my computer separate from the Creative Cloud. And I can't find my Photoshop box to get the access codes because it was several years ago that I bought it and I never had any issues with it until now.

Any advice?