Been running the Custom Firmware for several months working well, then suddenly a couple of days ago problems started, decided to reinstall, downloaded latest build, used my normal usb stick, program installed as per instructions but unable to open half the apps including Kodi, although Himedia player started ok but not much else would open. Many of the apps on the initial screen which didn't work had the old green Android symbol showing Whats the best method to take it back to Android 5?