This gives the file locations, but can you tell us what exactly you are trying to do?
If you have updated Photoshop and lost some plugins, you need to download the latest versions of those plugins, and reinstall. That will let them hook in to the new Photoshop version.
I know answering yourself is not smart but I chased down 1 plugin CC copied from CS and found the location of the Plug-in folder.
\program files\common files\Adobe\Plug-Ins
Simple when you have history to help.
Thanks for your reply Trevor. I've just gone back to CC after relying in CS for a few months and needed to (as many upgraders would need to) Have Photoshop CC recognize my plugins and Actions. I went through the idiot process of re-installing my plugins a fe years ago. Along the way getting messages like 'too many installs' and such because I've put first larger and eventually SSD drives in my computer. Far easier to just move existing x64 and 8ba files to the new plug ins folder. I found the location - posted in an earlier reply to myself. All is well now. Saved a few hours that shouldn't have to be this hard to do.
It would be useful to other people to know which particular plug-ins put a limit on the number of installations? I think I might have run into that with Alien Skin ( I can't be sure though). I don't remember it happening with anything else though. (Topaz bundle, Alien Skin Eye Candy 7, Flaming Pear space bundle and Flood, NIK — which is free now so obviously not an issue — and Pro Digital Star Filter Pro 4 — which several of this forum's regulars a beta testers for, but I would buy it if I had to.)