To use the dsu loader, YOU MUST UNLOCK BOOTLOADER, after unlocking, click dsu loader, select package, click "Agree" and dsu install will start. After intall finish, click "Discard" to cancel using the downloaded DSU. Click "Restart" to reboot your device and reboot into the Dynamic System. When it running, you can click "Restart" in the notification to reboot into original Android version.