Overwrite the original game folder with the patch game folder so they merge, overwrite everything that needs to be overwritten.
Some mods and modifications will need to be reapplied. If you use DRM cracks might need to overwrite it again. Back up saves before loading the game in that case
On a doesn't matter at all spoiler, Nodoka had her swimsuit added as a invite outfit. I don't see it in unlockables so might just be a base change. Had access before I hit 0.50 events
She figured out Himawari wasn't her daughter mid shapeshift , and seemingly knows what Himawari is, and that she hasn't heard of her kind in a long time.
Just playing around with generic events and I found something odd, if you visit Maya at the dorms you see Maya Prime, not the meat puppet. At least that's how it seems. Her affection can be raised. Dunno if this is new or I missed it before.