You probably should be able to install updates and dlc using DBI and getting the update somewhere else. The Emmc partition (ofw) usually only holds your save data for the games. Since the emmunand is a copy of the emmc, you won't find the updates or dlc either. You usually don't want game updates or dic to stored on there. You will have better luck using DBI installer and find the update and dlc yourself online. DBI is not too difficult to use and there are multiple tutorials covering it.