You should be able to find the "SFlogfile" text file under the same directory where you chose to install the SilverFast program. It represents a plugin module that allows Silver Fast to integrate with Photoshop. If you are still having problems locating the file, then you should try to search for it by using your computer. Go to the "Start" button, then select "Find," followed by "Folders or Files," and then type "SFlogfile.txt" in the search box.