Each version of this integration matches a specific build of Unreal Engine 4. Here is what has changed between the 2016.2.3.6077.422 and the 2016.2.3.6077.435 release of the integration (in addition to upgrading to the new Unreal build).

Unreal Engine 4.12/4.13/4.14/4.15 - Wwise 2016.2.3.6077.435

• WG-32914 Fixed: Avoid potential deadlocks and crashes in the AK Unreal IO code in a packaged game.