I downloaded the English Patch and Game from this forum. Everything has worked fine up until now and I've just finished all routes (all good and bad endings for Koujaku, Noiz, Mink and Clear) and Ren's sprite has disappeared from the title screen, so I know it must recognize I've finished all the paths. I suspect that the option to protect Ren appears during the Rhyme fight with Noiz but I held ctrl to skip through it all and the option never appeared, and neither did "Not really" but "Are you a magician?" and "Why the umbrella?" did appear when I got to that spot.