If you have steady hands and nerves of steel you could try filing it down with a dremmel fitted with a sandpaper tip - - I have done this myself on birds when their beaks are a bit long, and it would certainly help with your girl. Don't think it will fix her case completely, but it will help.
If you decide to do this, be very careful, go slowly, have a helper, and ONLY file off the clear tip of the top beak (see where the color changes in the photo?). Be careful you don't nip the tongue with the dremmel.
And if that seems a bit too stressful, a good vet can do this as well. I watched mine do it before I tried it at home.
Good luck!