use the files @bombername provided. 168 is needed to properly read bootloader code with dc-unlocker.
the archive has the dload folder inside along with the required files and the correct structure
extract the whole /dload/ folder into the ROOT of your EXTERNAL SD card, not internal storage
open stock calculator app in landscape mode and type ()()2846579()()
in the menu, go to software update > sdcard update and wait for reboot