if you want this then first unpack the game (it should be renpy so idk ask chatgpt)
second go to the "game" folder, then to images, then to characters, then to elena then elena og outfit
elenas dress should be part A and C final, not the clear/lineart ones (you can see that the one you are looking for is the later one)
last replace with these images
Image A ^
image c ^
boom