I rarely have used this, and to test it, I took a folder full of JPEG files, and batch converted them to UFO. This is what I used, and it just ran though all of them, without asking for a file name for each image. I did note that it maintained the source image names. This may behave differently if you save them to the source image folder. I saved them to a different folder, just in case something messes up, I haven't trashed the source images.
Ron Petersen, Web Board Administrator