You lowered your rest and it's still shooting low? Isn't that like "I cut this board off twice and, it's still too short"?
If you get with the manufacturer's customer service, they should be able to get you the set-up instructions.
When your bow is tuned correctly, there are still too many variables to help without more information. Do you shoot a release of fingers (split finger or three under), if you don't use a peep, where is your anchor (under the chin, on a tooth, corner of the mouth, back of the jaw, high on the cheek bone), do you use a high or low wrist grip, etc. Slight changes in any of these can change your impact point and effectively lengthen of shorten your sight window.