That is a good question. It took me awhile to figure out how to apply the code. I don't even remember copying it. But somehow, at one point, when I go to log into the game now it brings up two options, the original one (can't remember the name of it now) and a second option to log in to Shadowbringers. I logged in under the Shadowbringers. But I'm not sure if there is any way to check while playing the game whether I indeed am playing with a version that has Shadowbringer.