Meow,
I always think. If something work without problems why update it. Unless you have some new computer and it not compatible with it or it have a very special feature you want to use.
But I can advise to think if you creating a product good to keep a backup of the versions of all programs and apps you using to create it.
I have been lazy to rate games here. What I like more in this VN is that it have animated parts.
Mewing,
Pandrine