You have to be rooted and have a root file manager.
- open the file manger and go to system
- then to usr
- then to keylayout
- now open the Generic.kl
- scroll down to key 139
- open as a text file
- change from "MENU" to "APP_SWTICH"
- no "" needed
- save the file and reboot
Honestly i did it in the sec_e-pen.kl and sec_keyboard.kl and sec_touchscreen.kl just to be sure. I dont know if it is needed but i did anyway and have had no side affects.
Again if this has been posted before feel free to delete or move just i havent seen it so i thought others would want to know