Greetings,
My Asus router is currently at 3.0.0.4.374_379-g9540d57 and the latest firmware file name is RT-AC68U_9.0.0.4_386_41994-g769f84f. I've tried both by letting it check for an install update and manually by giving it the file I've downloaded from ASUS web site. In both cases, it goes...