I was able to find and re-install (re-show) the Stock Search Pro 2 into my Ps 2025 UI - per your suggestion. Thank you.
But, I'm unable to load it into my Ps 2025 beta on my Acer Predator laptop (I keep production & beta apps segregated). When I go to the same plugin mgr that lets me see my plugins/extensions, when on the laptop, it says "incompatible". I don't know if the app is incompatible with the beta or something else. Both my computers are Win 11 (desktop = pro, laptop = home) systems, but the desktop runs an AMD RX6800 XT processor and the laptop an NVIDIA RTX 4090.
Thank you again for the pointer where to locate your app.