If you are looking for the most recent updates (2024), the game has transitioned to the (Version 3.11.x).
Added support for Cross-Play and Cross-Buy between the Xbox One and Windows 10 versions. System Mechanics: Killer.Instinct.Update.3.rar
Unified startup time to 8 frames across the cast. Major Balance Adjustments If you are looking for the most recent
Nerfed "Feral Cancel" with a longer cooldown but added a new Diving Slash command move. Killer.Instinct.Update.3.rar
Introduced an all-new "Next Gen" lighting system that completely revamped the lighting and reflections for all existing stages.