Hello, I've got an old asus chromebox running openelec that I would like to upgrade to libreelec. Everywhere I've searched says that there was a migration file that was placed in the update folder of openelec. I cannot find this file any more. Are there any alternatives to updating this device? I do not care about existing files and configurations. I've tried putting the current libreelec file on a usb drive but I cannot get it to boot from it and I cannot get into the bios or anything other than openelec.