You can apparently avoid the NTR (probably through content filter), then tell your sister to bugger off and just have sex with Eva alone (though her emotional frigidity was a huge turn-off, she appears to be asexual)
But then you have to skip the old sister molesting scene, so this update changed nothing if you already chose the incest path.
Also, the "Teen-er" option is gone from the settings, so it seems like the tag was already censored before it got any content.
Right click and save link as
But as I mentioned before, it does not work any longer. Unlocks everything but you only can click on scenes you have unlocked yourself.