I am on a Mac running Yosemite 10.10.5 and have been using PS CC2015 through various updates. I have plug-ins from Nik, Topaz, OnOne, and AutoFX. They have always worked via PS CC2015. Now, they have suddenly disappeared from the Filters menu completely. I tried closing PS and re-downloading one Topaz filter and reinstalling as a test. It does not show up in PS. In my Finder I can see that all plug-ins are still in their proper folders in PS, but PS is not seeing them. Can someone help please? I hate to reinstall PS completely if I don't have to, and am not even sure that would fix the problem.