Ps CS6 and Ps 2025 not working together

I am a CC subscriber who still uses Br and Ps CS6 together with Br and Ps 2025 on the same Windows 10 computer.  It's important that I maintain access to certain Br/Ps CS6 plugins/extensions that are no longer available (or do not work) with later versons.

Both Ps/Br CS6 and Ps/Br CC (various versions) coexisted without problems until recent versions have broken things.  Br CS6 now insists on running Bridge plugins/extension/scripts (such as the image processor) with Ps 2025. If Ps CS6 is open nothing will run. As soon as I uninstall Ps 2025 everything will work again properly.

I noted that Ps 2025 preconfigures itself as the default app for many plugin file extensions that were undefined with CS6 (eg: .8ba, .8Be, .8bf, .8bi, .8Li, .8bx, .8ME and others). I hoped that deleting these file associations in the Registry would fix things (in [HKEY_CLASSES_ROOT] and [HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\]) but that did not work.

I tried setting Photosahop CS6 as the default app in Br CS6 Preferences/File Association Types and that did not resolve the issue.

Is there any workaround other than not uninstalling Ps 2025 and only use it on my second computer?

Thanks for any help in resolving this mystery.