How do you include plugins in packaged builds?

Try adding

[Plugins]
EnabledPlugins=VictoryBPLibrary

this is my DefaultEngine.ini

[URL]
GameName=KinectDemo

[/Script/WindowsTargetPlatform.WindowsTargetSettings]
-TargetedRHIs=PCD3D_SM4


[Plugins]
EnabledPlugins=KinectV2

[/Script/EngineSettings.GameMapsSettings]
EditorStartupMap=/Engine/Maps/Templates/Template_Default
EditorStartupMap=/Game/Maps/Minimal_Default
TransitionMap=
bUseSplitscreen=True
TwoPlayerSplitscreenLayout=Horizontal
ThreePlayerSplitscreenLayout=FavorTop
GameDefaultMap=/Engine/Maps/Entry
GameDefaultMap=/Game/Maps/Minimal_Default
GlobalDefaultGameMode=/Script/Engine.GameMode
GlobalDefaultGameMode=/Game/Blueprints/NewGameMode.NewGameMode_C
GlobalDefaultServerGameMode=/Script/Engine.GameMode
GlobalDefaultServerGameMode=/Game/Blueprints/NewGameMode.NewGameMode_C