Reader Response Criticism in hermeneutics says that once an artist releases a work, s/he loses control over it. S/he cannot force an interpretation of the work on anyone, it is up to those who experience it to respond to it. That is where the meaning of the work lies, not in the intention of the artist, which is not considered to have over-riding relevance.
So if we think that Han shooting first is what happened because this is what we saw in 1977, and is in keeping with our view of Han's character, and Lucas goes back and re-cuts it, as he did, we can say that we disagree with that. The difference here is that the law doesn't really support this, and he has control over the version of the scene that he wants. That said, he cannot change what we remember to be true, nor the cuts that already exist outside of his domain.
I wonder how much longer consumers will have control over editions of art what with the proliferation of streaming movies and e-book services like Kindle.