In the unauthorised version shown on Tencent Video, Durden is still shot and killed, but the final scene of the buildings exploding is replaced with a black screen and words that say the police discovered the plan, stopped it, and sent the Narrator to an asylum.
Hot take, but it’s not like people understood the plot of that movie anyway, lol.
Take a film/book about toxic masculinity and the dangers of capitalist societies and a bunch of 20 year old boys with daddy issues will forget any message and worship Tyler forever after.