CAM file generation from Eagle

Having trouble using the Cam Processor in Eagle. I’ve got the .cam file from seeed in eagle’s cam folder.

There is nothing selected for file, or device. I don’t see anywhere to select which cam processor is used. Can anyone let me know what I’m doing wrong?

(Eagle 6.3.0 Light, Mac)

Also, do I need to check any of the options Mirror, Rotate, Upsidedown? (all are off)