you would only need to flash it but let me dig something up for you this tool all you need to do is upgrade
there all easy nowTeddyRaspin wrote: ↑Wed Jan 17, 2018 8:41 pmAsus 3.02 clean firmware with flasher (to allow crossflash or easy upgrade from previous versions).
urf it didn't put attachment you can just click up arrow to view original post or ill try to link attachment download/file.php?id=1252