This can't never work on a GJ-device! A GO 910 (and every other GO) isn't a TomTom with this restricted menu! Don't waste your time with this nonsense...
This "GJ" is a special device and only his original special NC 9.510 run properly. Other NC (DSA) does not running properly (missing sound). There is no way to use another NC-emulation. Only with this "tomtom.mnu" you can get missing menu-options