It's just a cashgrab from Squad because they know they won't be making much more money off KSP anytime soon, and will be damned if they can think of something original.
Yeah, I noticed this too, all of the games legal/technical stuff seems kinda outdated, if you look at the readme, you'll notice it still has the names of employees who no longer work for Squad on it.
Pretty directly referencing the worst accident to happen in the history of space travel, in the form of an animated clip, does not seem that cool to me.
Why would you install windowshine and VSR at the same time? Windowshine is for the stock models, shiny windows will automatically come to you if you have VSR and texturereplacer installed.