I didn't put it in anything: I let the App install everything in the default folders, as I always have.
I just checked, and there is no /plug-ins/en_US/ folder, which, I guess, explains it! Did the plugins folder change since 6.5? I never really had to worry about that before, so I assumed it would still be OK. My bad!
So I simply uninstall my current version of the plugin, get the one from Soundforge (since I don't want to mess with the App any more than I have! I seem to only cause messes since I've upgraded!) and put that one in the new folder. Right?
I can do that!
But gad, I miss 6.5 every day more... *sigh*
Thanks a lot for your help, Pwolf! Much appreciated!
S.