I work on an iMac (11,1) with OS 10.6.8, 16 GB ram. I use Nik Color Efex 4 as a Lightroom add in. When I complete my Color Efex edits and return to Lightroom the edited file is not grouped with the files that have the same key word. I can go to folder view and find the edited file there and it has the same key word tag as the original. But when I use the key word panel to create a list of files with the same key word the edited file does not appear in the list.