ahh, let me just clarify something for you...
i honestly don't know anything about this manga. Lamei, our redrawer, suggested that we tackle it because he likes the author's other works, and that's how we found TheLaidBackMan, our new redrawer for this title. i have never heard of this title until someone had to point it out for me.
plus, i don't read the raws. i have a personal policy of not reading raws because i fear that i might end up spoiling the later chapters if i get too excited... so i'm just really going on a opinionated rampage on the afterword. if she really is just a reincarnated person, then that explains a LOT of things with her dialogue.
I know this is old, but I just found this series, so excuse me for replying.
The specific usage of "uninstall" and game terminology seems important, I really felt like it was the wrong move to change it. Context really matters, so if you don't know what this is all about, it would have been better to either try to find out first or leave the terms.
Like, from the looks of it, it's very likely that this is an offshoot of the "game isekai" type, where the sister is either a modern day person who reincarnates into a game she plays, or if not she might be just an in-universe person who became aware of the "game scenario". In which case the terminology is not just "strange", but meant to be a "forshadowing" that will be explained later.
I'm sure by now the manga already explained what this means, I don't know, I'm just commenting based on what I saw here.