Could be all you need to do is adjust the rest slightly (we're talking less than a sixteenth of an inch for each adjustment). First thing to do is make some reference marks so you can return the bow to the existing setup if need be.

Then try some tuning. If she's right handed, move the rest very slightly in toward the bow. Have her shoot FPs and BHs. If they now hit together (L to R), leave the rest there. Then move the rest up slightly and have her shoot again. If FPs and BHs hit together, you're all set. You may need to make more than one adjustment to get things together.

Then adjust pins as needed for desired POI.