Each version of this integration matches a specific build of Unreal Engine 4. Here is what has changed between the 2016.2.0.5972.274 and the 2016.2.0.5972.301 release of the integration (in addition to upgrading to the new Unreal build).

Unreal Engine 4.12/4.13/4.14 - Wwise 2016.2.0.5972.301

• WG-31589 Fixed: Do not destroy a spawned component that is not set to auto-destroy and is failing to post an event.
• WG-31678 Fixed: Streaming files can now be opened correctly.
• WG-31771 Fixed: Avoid a crash when adding an AnimNotify_AkEvent to a playing animation.