Hi SNM! Last week the operating system on my iMac failed, and the Apple techs had to wipe and reformat the hard drive as part of the repair process. Fortunately all of my data was backed up onto an external hard drive, so I was able to recover everything including my library of about 20 Cathe downloaded workouts. All of the recovered Cathe video files are working just fine in iTunes and on my iPod, and will play (through the iPod) on our TV. But the Workout Blender will not recognize or import the files, presumably because they've been "moved" from their original downloaded location. I re-installed the newest version of the Blender and deleted the Cathe folder, etc., per your instructions, and I'm getting nowhere. Can you help??