It works but the way how to install it is outdated (as none have the will to update it anyway).
It says to put the Ipatch in "game" folder but it didn't work for me. So, I made several copies around the game's folder (one copy of the Ipatch in "lib" folder, "game" folder, even in the main folder with the .EXE and .RPY.
And, for some miracle, when I loaded the game, it asked me if I wanted the Incest Mode on and that I could change it in Options.
So, I can't say which folder you should put the Ipatch but you can try what I did: put one in each folder. Don't worry, It won't break the game (at least, didn't break mine and I am playing the compressed version on Android with JoiPlay).