You may be able to return the app store version via the Report a Problem link on your receipt.
However, if you already have these plugins installed someplace else, it may work to go to the preferences>plug-in and set that location as your additional plug-ins folder.
Thanks for your suggestions Barbara, I might yet, alas, have to adopt your first one, however I'd prefer to try the second.
My problem seems to be the pathing provided by Adobe which I can't add to or change. It is:
MacintoshHD/Users/Apple/Library/Containters/com.adobe.pse11editor/Data/Library/Application Support/Adobe/Adobe Photoshop Elements 11 Editor/Plug-ins/
Installed in this folder are the Topaz filters, and they show up inside Adobe PSE11, but when I go to run them I get an error message saying: "IPC memory is in use, or Image Size is too big for the system."
It's not the later, because the image is 124 KB.
You can try contacting tech support, but I doubt you'll get much help, since they often seem to be missing the pages even for regular PSE from their scriptbooks, and the odds of finding anyone there who understands the app store version are very, very low.
Ok thanks, will try. Must say the Topaz people have been great, but their hands seem to be tied by Adobe.