Saw the update indeed, now found the boots, which makes me wonder if I completely missed that area before, or that you made it easier to reach with that update.
Didn't find the buttons yet though. However, I just finished the game without them, so gonna watch the spoilers. Thanks! And kudos for responding the way you did.
Perhaps some hints scattered around the levels could've been a nice addition for the hard to find stuff?
Edit: And oh damn! About the spoiler, I totally forgot about that corridor. At some point I was remembering I should use some of my equipment to reach that, but totally forgot!