The trick to finding alternate versions: (1) use your PC, not a DVD player; and (2) click to the left of "Play Movie" from the main menu. A new menu will be displayed offering the viewer a choice of SALT versions.
Hmm I did but nothing happened. What could I be doing wrong? I'm using my computer and it's not working. I'm guessing they made this hard because it's a spy movie. I have the regular deluxe unrated edition not blu-ray.
I was able to access the same versions menu referenced above on the DVD in my DVD Player by going to the DVD Main Menu and toggling the blue 'selection' indicator to the left until it's on the left-hand side of the 'Play Movie' option.
The important thing here is that the DVD had to be in my DVD player, NOT my blu-ray player. Clicking on the same selection with the disc loaded in my blu-ray player just plays the Theatrical Version of the film - there is no way to access the selection menu with the DVD version loaded in a blu-ray player.
So, if you don't have a DVD player anymore, just get the blu-ray disc if you want to see the other versions of the film.