Because Many key resellers list Batman: Arkham Knight Complete Edition as "17 ela upd" to differentiate it from the original broken launch version (v1.0). If you see "17 ela upd," it actually means you are getting the good version.
The Batman: Arkham Knight Complete Edition is the definitive version of the game. It bundles the main campaign with all post-launch downloadable content (DLC) released by WB Games and Rocksteady. Unlike the standard edition, which locked key narrative threads behind a Season Pass, the Complete Edition includes: batman arkham knight complete edition 17 ela upd
Even update 17 still crashes when you exit the game. This is a legacy engine bug. The community fix (included in the "ela" repack notes) is simple: Just don't alt-tab during the final credits sequence. The game saves fine, but the exit crash is cosmetic. Because Many key resellers list Batman: Arkham Knight