plaintivestrips

Sorry for being a complete newbie at this, but I downloaded this vn from another website, rather than buying it from Fakku or Steam. Is there any way I can apply the patches to the game? (This is also my first time installing a patch) Edit- Was wondering, can we see the H-scenes only in the menu? I completed the 3 main routes and didn't encounter any of the H-scenes between the story.