I installed a version of Unlaunch without write protection on the ticket with TWLnf, since the installer didn't work because of mismatched fat copies. I wanted to update, but we couldn't do that with TWLnf, so I uninstalled Unlaunch (to avoid the data management brick) and copied all my DSiWare to SD, deleted them, and copied them back. However, this still resulted in mismatched fat copies, so I tried updating to undo the 1.4 downgrade I had made in preparation for RocketLauncher. However, midway through it errored, shut down, and would only boot up to black screens. I even tried calling nintendo support about that error, but they didn't know what it meant.