I did find one little glitch in this, but it was easy to correct. When I did what you suggested, for some reason it showed project files and soundfont files (.sf2) and these were showing up from directories other than my Cubase Projects folder, but these other folders were in my Favorites list. So I added the Cubase Projects folder to my favorites and then I could filter on that as well as project files (.cpr) and then I just saw my project files.