Hello for those of you who installed through cydia and know how to work with ifile itools i was able to resolve this issue for myself. So When installing through cydia the installation directory yugioh.app/media/decks and yugioh.app/media/replays are not the locations to put the the decks and replays rather in mobile/documents/deck and var/mobile/documents/replay. Also noticed system.conf in yugioh.app/media/system.config is ignored creating one in var/mobile/documents/system.config. So install through cydia very simple. Connect your device to PC using itools go to var/mobile/documents/ create a "replay" folder and "deck" folder place your deck and replays in these two folders. Hopefully this helps for jailbroken ios users