If you had THUMBNAILER, or a similar software, the images in your format would show and you could delete the rest. Otherwise, I only know to R-click then open 'properties' of ea to find your format. After you find it (say it's the 5th in the row)--then start the next search at the 5th icon to see if it's yours. For each design can be tedious. There are some free softwares that might help...Pulse Ambassador will let you set to 'open' only your format; Wilcom might (I've never used it). Maybe someone else has better advice.