"There may be times when the app asks you to update but when you go to the App Store, there is no Update button displayed and only the option is to Open.

In this case, tap the App Store's 'Updates' tab and swipe downward from the top of the screen to refresh the Updates list.

If after performing the above, Romancing SaGa Re;univerSe does not appear on the list, please wait until the App Store has been updated.

Sometimes, even after you have updated and used Open to go to the app from the App Store, the app may still ask you to update; in this case, restart the app and try the procedures mentioned above again."