I can't believe the game got updated yet again... Anyway, from looking at the DLsite page's update history, 2.14 fixed display issues with some CGs while 2.15 added the recruitment of all allies if you fully unlock the Succubus House. As SIW TL13 is for version 2.13 (though the shared number is a coincidence), applying it means you'll lose out on the latest changes, but the translation will otherwise work.
I'll update the translation to work on version 2.15 soon. Hopefully this is the last update...