diff --git a/Agora-Unreal-SDK-Blueprint-Example/Content/API-Example/Basic/JoinChannelAudio/WBP_AudioWidget.uasset b/Agora-Unreal-SDK-Blueprint-Example/Content/API-Example/Basic/JoinChannelAudio/WBP_AudioWidget.uasset
index 0f43b284..5811e8fc 100644
Binary files a/Agora-Unreal-SDK-Blueprint-Example/Content/API-Example/Basic/JoinChannelAudio/WBP_AudioWidget.uasset and b/Agora-Unreal-SDK-Blueprint-Example/Content/API-Example/Basic/JoinChannelAudio/WBP_AudioWidget.uasset differ
diff --git a/Agora-Unreal-SDK-Blueprint-Example/Content/API-Example/HelperFunctionLibrary/BFL_SaveGameHelper.uasset b/Agora-Unreal-SDK-Blueprint-Example/Content/API-Example/HelperFunctionLibrary/BFL_SaveGameHelper.uasset
index c592f3b3..8679681e 100644
Binary files a/Agora-Unreal-SDK-Blueprint-Example/Content/API-Example/HelperFunctionLibrary/BFL_SaveGameHelper.uasset and b/Agora-Unreal-SDK-Blueprint-Example/Content/API-Example/HelperFunctionLibrary/BFL_SaveGameHelper.uasset differ
diff --git a/Agora-Unreal-SDK-Blueprint-Example/Content/API-Example/HelperFunctionLibrary/BFL_Utility.uasset b/Agora-Unreal-SDK-Blueprint-Example/Content/API-Example/HelperFunctionLibrary/BFL_Utility.uasset
index 6f7dba65..96ab16ba 100644
Binary files a/Agora-Unreal-SDK-Blueprint-Example/Content/API-Example/HelperFunctionLibrary/BFL_Utility.uasset and b/Agora-Unreal-SDK-Blueprint-Example/Content/API-Example/HelperFunctionLibrary/BFL_Utility.uasset differ
diff --git a/Agora-Unreal-SDK-Blueprint-Example/Content/API-Example/WBP_OneExampleEntry.uasset b/Agora-Unreal-SDK-Blueprint-Example/Content/API-Example/WBP_OneExampleEntry.uasset
index 3219e80a..34d421d5 100644
Binary files a/Agora-Unreal-SDK-Blueprint-Example/Content/API-Example/WBP_OneExampleEntry.uasset and b/Agora-Unreal-SDK-Blueprint-Example/Content/API-Example/WBP_OneExampleEntry.uasset differ
diff --git a/Agora-Unreal-SDK-Blueprint-Example/Source/AgoraBPExample.Target.cs b/Agora-Unreal-SDK-Blueprint-Example/Source/AgoraBPExample.Target.cs
index e7a8e4db..a21ab0c0 100644
--- a/Agora-Unreal-SDK-Blueprint-Example/Source/AgoraBPExample.Target.cs
+++ b/Agora-Unreal-SDK-Blueprint-Example/Source/AgoraBPExample.Target.cs
@@ -2,6 +2,7 @@
 
 using UnrealBuildTool;
 using System.Collections.Generic;
+using System;
 
 public class AgoraBPExampleTarget : TargetRules
 {
@@ -19,7 +20,7 @@ public AgoraBPExampleTarget( TargetInfo Target) : base(Target)
 		if (Target.Platform == UnrealTargetPlatform.IOS || Target.Platform == UnrealTargetPlatform.Mac)
         {
             bOverrideBuildEnvironment = true;
-   
+
             // [-Wno-unused-but-set-variable]: fix error "variable 'layerNames' set but not used"
             // [-Wno-gcc-compat]: gcc does not allow an attribute in this position on a function declaration
             // [-Wno-reorder-ctor]: fix error "field 'eventHandler' will be initialized after field 'mccUid'"
@@ -33,12 +34,25 @@ public AgoraBPExampleTarget( TargetInfo Target) : base(Target)
 
             // [-Wno-single-bit-bitfield-constant-conversion]: UE_4.27/Engine/Source/Runtime/Engine/Public/MaterialShared.h:2304:30: error: implicit truncation from 'int' to a one-bit wide bit-field changes value from 1 to -1 
             //  MarkedForGarbageCollection = 1;
-            // AdditionalCompilerArguments = "-Wno-unused-but-set-variable -Wno-gcc-compat -Wno-reorder-ctor -Wno-deprecated-builtins -Wno-bitwise-instead-of-logical -Wno-single-bit-bitfield-constant-conversion";
+
+            if (Target.Version.MajorVersion < 5)
+            {
+                AdditionalCompilerArguments = "-Wno-unused-but-set-variable -Wno-gcc-compat -Wno-reorder-ctor -Wno-deprecated-builtins -Wno-bitwise-instead-of-logical -Wno-single-bit-bitfield-constant-conversion";
+
+                Console.WriteLine("[Apply Compiler Arguments] For UE Ver < 5: AdditionalCompilerArguments: " + AdditionalCompilerArguments);
+            }
+
 
             // error: unknown warning option '-Wno-deprecated-builtins'; did you mean '-Wno-deprecated-volatile'? [-Werror,-Wunknown-warning-option]
             // error: unknown warning option '-Wno-single-bit-bitfield-constant-conversion'; did you mean '-Wno-bitfield-constant-conversion'? [-Werror,-Wunknown-warning-option]
-            AdditionalCompilerArguments = "-Wno-unused-but-set-variable -Wno-gcc-compat -Wno-reorder-ctor";
-            
-		}
+
+            else
+            {
+                AdditionalCompilerArguments = "-Wno-unused-but-set-variable -Wno-gcc-compat -Wno-reorder-ctor";
+
+                Console.WriteLine("[Apply Compiler Arguments] For UE Ver >= 5: AdditionalCompilerArguments: " + AdditionalCompilerArguments);
+            }
+
+        }
 	}
 }
diff --git a/Agora-Unreal-SDK-Blueprint-Example/Source/AgoraBPExample/BFL_UtilityTool.cpp b/Agora-Unreal-SDK-Blueprint-Example/Source/AgoraBPExample/BFL_UtilityTool.cpp
index 838cf926..17cf3a2d 100644
--- a/Agora-Unreal-SDK-Blueprint-Example/Source/AgoraBPExample/BFL_UtilityTool.cpp
+++ b/Agora-Unreal-SDK-Blueprint-Example/Source/AgoraBPExample/BFL_UtilityTool.cpp
@@ -2,6 +2,8 @@
 
 
 #include "BFL_UtilityTool.h"
+#include "Misc/EngineVersion.h"
+
 
 bool UBFL_UtilityTool::IsAgoraAudioOnlySDK()
 {
@@ -12,3 +14,14 @@ bool UBFL_UtilityTool::IsAgoraAudioOnlySDK()
 #endif
 
 }
+
+FString UBFL_UtilityTool::GetAgoraSaveDataSlotName()
+{
+	
+	FEngineVersion EngineVersion = FEngineVersion::Current();
+	FString VersionString = EngineVersion.ToString(EVersionComponent::Patch);
+	// UE_LOG(LogTemp, Log, TEXT("Current Engine Version: %s"), *VersionString);
+
+	FString SlotName = "AgoraSaveData_" + VersionString;
+	return SlotName;
+}
diff --git a/Agora-Unreal-SDK-Blueprint-Example/Source/AgoraBPExample/BFL_UtilityTool.h b/Agora-Unreal-SDK-Blueprint-Example/Source/AgoraBPExample/BFL_UtilityTool.h
index 08cb501a..c09febae 100644
--- a/Agora-Unreal-SDK-Blueprint-Example/Source/AgoraBPExample/BFL_UtilityTool.h
+++ b/Agora-Unreal-SDK-Blueprint-Example/Source/AgoraBPExample/BFL_UtilityTool.h
@@ -17,4 +17,8 @@ class AGORABPEXAMPLE_API UBFL_UtilityTool : public UBlueprintFunctionLibrary
 
 	UFUNCTION(Blueprintcallable)
 	static bool IsAgoraAudioOnlySDK();
+
+
+	UFUNCTION(BlueprintPure)
+	static FString GetAgoraSaveDataSlotName();
 };
diff --git a/Agora-Unreal-SDK-Blueprint-Example/Source/AgoraBPExampleEditor.Target.cs b/Agora-Unreal-SDK-Blueprint-Example/Source/AgoraBPExampleEditor.Target.cs
index 813f4406..1c60261c 100644
--- a/Agora-Unreal-SDK-Blueprint-Example/Source/AgoraBPExampleEditor.Target.cs
+++ b/Agora-Unreal-SDK-Blueprint-Example/Source/AgoraBPExampleEditor.Target.cs
@@ -2,6 +2,7 @@
 
 using UnrealBuildTool;
 using System.Collections.Generic;
+using System;
 
 public class AgoraBPExampleEditorTarget : TargetRules
 {
@@ -28,11 +29,25 @@ public AgoraBPExampleEditorTarget( TargetInfo Target) : base(Target)
 
             // [-Wno-single-bit-bitfield-constant-conversion]: UE_4.27/Engine/Source/Runtime/Engine/Public/MaterialShared.h:2304:30: error: implicit truncation from 'int' to a one-bit wide bit-field changes value from 1 to -1 
             //  MarkedForGarbageCollection = 1;
-            // AdditionalCompilerArguments = "-Wno-unused-but-set-variable -Wno-gcc-compat -Wno-reorder-ctor -Wno-deprecated-builtins -Wno-bitwise-instead-of-logical -Wno-single-bit-bitfield-constant-conversion";
+
+            if (Target.Version.MajorVersion < 5)
+            {
+                AdditionalCompilerArguments = "-Wno-unused-but-set-variable -Wno-gcc-compat -Wno-reorder-ctor -Wno-deprecated-builtins -Wno-bitwise-instead-of-logical -Wno-single-bit-bitfield-constant-conversion";
+
+                Console.WriteLine("[Apply Compiler Arguments] For UE Ver < 5: AdditionalCompilerArguments: " + AdditionalCompilerArguments);
+            }
+
 
             // error: unknown warning option '-Wno-deprecated-builtins'; did you mean '-Wno-deprecated-volatile'? [-Werror,-Wunknown-warning-option]
             // error: unknown warning option '-Wno-single-bit-bitfield-constant-conversion'; did you mean '-Wno-bitfield-constant-conversion'? [-Werror,-Wunknown-warning-option]
-            AdditionalCompilerArguments = "-Wno-unused-but-set-variable -Wno-gcc-compat -Wno-reorder-ctor";
+
+            else
+            {
+                AdditionalCompilerArguments = "-Wno-unused-but-set-variable -Wno-gcc-compat -Wno-reorder-ctor";
+
+                Console.WriteLine("[Apply Compiler Arguments] For UE Ver >= 5: AdditionalCompilerArguments: " + AdditionalCompilerArguments);
+            }
+
             
         }
 		
diff --git a/Agora-Unreal-SDK-CPP-Example/Content/API-Example/Basic/JoinChannelAudio/BP_AudioWidget.uasset b/Agora-Unreal-SDK-CPP-Example/Content/API-Example/Basic/JoinChannelAudio/BP_AudioWidget.uasset
index 2177a937..599ec31f 100644
Binary files a/Agora-Unreal-SDK-CPP-Example/Content/API-Example/Basic/JoinChannelAudio/BP_AudioWidget.uasset and b/Agora-Unreal-SDK-CPP-Example/Content/API-Example/Basic/JoinChannelAudio/BP_AudioWidget.uasset differ
diff --git a/Agora-Unreal-SDK-CPP-Example/Source/AgoraExample.Target.cs b/Agora-Unreal-SDK-CPP-Example/Source/AgoraExample.Target.cs
index 5a3da1fd..25a0c740 100644
--- a/Agora-Unreal-SDK-CPP-Example/Source/AgoraExample.Target.cs
+++ b/Agora-Unreal-SDK-CPP-Example/Source/AgoraExample.Target.cs
@@ -2,6 +2,7 @@
 
 using UnrealBuildTool;
 using System.Collections.Generic;
+using System;
 
 public class AgoraExampleTarget : TargetRules
 {
@@ -32,13 +33,27 @@ public AgoraExampleTarget( TargetInfo Target) : base(Target)
             // [-Wno-bitwise-instead-of-logical]: UE_4.27/Engine/Source/Runtime/CoreUObject/Public/AssetRegistry/AssetDataTagMap.h:36:32: note: cast one or both operands to int to silence this warning
             // bool IsEmpty() const { return Class.IsNone() & Package.IsNone() & Object.IsNone(); } //-V792\n
 
+
             // [-Wno-single-bit-bitfield-constant-conversion]: UE_4.27/Engine/Source/Runtime/Engine/Public/MaterialShared.h:2304:30: error: implicit truncation from 'int' to a one-bit wide bit-field changes value from 1 to -1 
             //  MarkedForGarbageCollection = 1;
-            // AdditionalCompilerArguments = "-Wno-unused-but-set-variable -Wno-gcc-compat -Wno-reorder-ctor -Wno-deprecated-builtins -Wno-bitwise-instead-of-logical -Wno-single-bit-bitfield-constant-conversion";
+
+            if (Target.Version.MajorVersion < 5)
+            {
+                AdditionalCompilerArguments = "-Wno-unused-but-set-variable -Wno-gcc-compat -Wno-reorder-ctor -Wno-deprecated-builtins -Wno-bitwise-instead-of-logical -Wno-single-bit-bitfield-constant-conversion";
+
+                Console.WriteLine("[Apply Compiler Arguments] For UE Ver < 5: AdditionalCompilerArguments: " + AdditionalCompilerArguments);
+            }
+
 
             // error: unknown warning option '-Wno-deprecated-builtins'; did you mean '-Wno-deprecated-volatile'? [-Werror,-Wunknown-warning-option]
             // error: unknown warning option '-Wno-single-bit-bitfield-constant-conversion'; did you mean '-Wno-bitfield-constant-conversion'? [-Werror,-Wunknown-warning-option]
-            AdditionalCompilerArguments = "-Wno-unused-but-set-variable -Wno-gcc-compat -Wno-reorder-ctor";
+
+            else {
+                AdditionalCompilerArguments = "-Wno-unused-but-set-variable -Wno-gcc-compat -Wno-reorder-ctor";
+
+                Console.WriteLine("[Apply Compiler Arguments] For UE Ver >= 5: AdditionalCompilerArguments: " + AdditionalCompilerArguments);
+            }
+
         }
     }
 }
diff --git a/Agora-Unreal-SDK-CPP-Example/Source/AgoraExample/AgoraActor.cpp b/Agora-Unreal-SDK-CPP-Example/Source/AgoraExample/AgoraActor.cpp
index 84f55e7d..8b358834 100644
--- a/Agora-Unreal-SDK-CPP-Example/Source/AgoraExample/AgoraActor.cpp
+++ b/Agora-Unreal-SDK-CPP-Example/Source/AgoraExample/AgoraActor.cpp
@@ -3,6 +3,7 @@
 
 #include "AgoraActor.h"
 #include "Engine/Engine.h"
+#include "Utility/BFL_UtilityTool.h"
 
 // Sets default values
 AAgoraActor::AAgoraActor()
@@ -23,7 +24,7 @@ void AAgoraActor::BeginPlay()
 	}
 	VideoWidget->AddToViewport();
 
-	if (UAgoraConfig* LoadedGame = Cast<UAgoraConfig>(UGameplayStatics::LoadGameFromSlot(FString("AgoraSave"), 0)))
+	if (UAgoraConfig* LoadedGame = Cast<UAgoraConfig>(UGameplayStatics::LoadGameFromSlot(UBFL_UtilityTool::GetAgoraSaveDataSlotName(), 0)))
 	{
 		if (bLoadConfig)
 		{
diff --git a/Agora-Unreal-SDK-CPP-Example/Source/AgoraExample/Examples/Advanced/JoinChannelVideoToken/JoinChannelWithTokenWidget.cpp b/Agora-Unreal-SDK-CPP-Example/Source/AgoraExample/Examples/Advanced/JoinChannelVideoToken/JoinChannelWithTokenWidget.cpp
index 2cffa2e8..bacc50ab 100644
--- a/Agora-Unreal-SDK-CPP-Example/Source/AgoraExample/Examples/Advanced/JoinChannelVideoToken/JoinChannelWithTokenWidget.cpp
+++ b/Agora-Unreal-SDK-CPP-Example/Source/AgoraExample/Examples/Advanced/JoinChannelVideoToken/JoinChannelWithTokenWidget.cpp
@@ -72,6 +72,7 @@ void UJoinChannelWithTokenWidget::ShowUserGuide()
 		"1. You can join the channel using the token you provide.\n"
 		"2. You can also join the channel using the token retrieved from the server.\n"
 		"3. A simple server can be launched with the website link commented in the source code.\n"
+		"4. The demo won't work if the engine version is under 4.27."
 		"";
 
 	UBFL_Logger::DisplayUserGuide(Guide, LogMsgViewPtr);
diff --git a/Agora-Unreal-SDK-CPP-Example/Source/AgoraExample/Examples/Advanced/SpatialAudioWithMediaPlayer/SpatialAudioWithMPWidget.h b/Agora-Unreal-SDK-CPP-Example/Source/AgoraExample/Examples/Advanced/SpatialAudioWithMediaPlayer/SpatialAudioWithMPWidget.h
index 77c74768..1cbb9a0c 100644
--- a/Agora-Unreal-SDK-CPP-Example/Source/AgoraExample/Examples/Advanced/SpatialAudioWithMediaPlayer/SpatialAudioWithMPWidget.h
+++ b/Agora-Unreal-SDK-CPP-Example/Source/AgoraExample/Examples/Advanced/SpatialAudioWithMediaPlayer/SpatialAudioWithMPWidget.h
@@ -221,8 +221,9 @@ class AGORAEXAMPLE_API USpatialAudioWithMPWidget : public UBaseAgoraUserWidget
 	FString MPL_URL = "https://download.agora.io/demo/test/Agora.io-Interactions.wav";
 
 #else
-	FString MPL_URL =
-		"https://agoracdn.s3.us-west-1.amazonaws.com/videos/Agora.io-Interactions.mp4";
+	
+	FString MPL_URL = "https://download.agora.io/demo/test/Agora.io-Interactions.mp4";
+
 #endif
 
 	TSharedPtr<FUserIMediaPlayerSourceObserver> MediaPlayerSourceObserverWarpper;
diff --git a/Agora-Unreal-SDK-CPP-Example/Source/AgoraExample/Examples/MainAgoraUserWidget.cpp b/Agora-Unreal-SDK-CPP-Example/Source/AgoraExample/Examples/MainAgoraUserWidget.cpp
index 0c32895f..fd091fda 100644
--- a/Agora-Unreal-SDK-CPP-Example/Source/AgoraExample/Examples/MainAgoraUserWidget.cpp
+++ b/Agora-Unreal-SDK-CPP-Example/Source/AgoraExample/Examples/MainAgoraUserWidget.cpp
@@ -3,6 +3,8 @@
 
 #include "MainAgoraUserWidget.h"
 #include "AgoraPluginInterface.h"
+#include "Kismet/KismetSystemLibrary.h"
+#include "../Utility//BFL_UtilityTool.h"
 #include "GameFramework/GameUserSettings.h"
 
 #pragma region CustomTileView
@@ -61,6 +63,13 @@ void UMainAgoraUserWidget::NativeConstruct()
 	if(Txt_SDKVer){
 		Txt_SDKVer->SetText(FText::FromString(AgoraUERtcEngine::GetSDKVersion()));
 	}
+
+#if PLATFORM_ANDROID
+	// to keep screen on
+	// For IOS: please check IOS config ini: bEnableIdleTimer
+	UKismetSystemLibrary::ControlScreensaver(false);
+#endif
+
 }
 
 void UMainAgoraUserWidget::NativeDestruct()
@@ -72,7 +81,7 @@ void UMainAgoraUserWidget::NativeDestruct()
 	SaveGameInstance->Token = FString(TokenBox->GetText().ToString());
 	SaveGameInstance->Channelname = FString(ChannelBox->GetText().ToString());
 
-	if (UGameplayStatics::SaveGameToSlot(SaveGameInstance, FString("AgoraSave"), 0))
+	if (UGameplayStatics::SaveGameToSlot(SaveGameInstance, UBFL_UtilityTool::GetAgoraSaveDataSlotName(), 0))
 	{
 		UE_LOG(LogTemp,Warning,TEXT("Save Config Succeed"));
 	}
diff --git a/Agora-Unreal-SDK-CPP-Example/Source/AgoraExample/Utility/BFL_HTTPHelper.cpp b/Agora-Unreal-SDK-CPP-Example/Source/AgoraExample/Utility/BFL_HTTPHelper.cpp
index e868d54f..598a8b3b 100644
--- a/Agora-Unreal-SDK-CPP-Example/Source/AgoraExample/Utility/BFL_HTTPHelper.cpp
+++ b/Agora-Unreal-SDK-CPP-Example/Source/AgoraExample/Utility/BFL_HTTPHelper.cpp
@@ -6,6 +6,7 @@
 void UBFL_HTTPHelper::FetchToken(FString RequestURL, int64 uid, FString ChannelName, int64 Role, std::function<void(FString, bool)> Callback)
 {
 
+#if AG_UE427_OR_LATER
 	// Create Json Data
 	FString ServerData;
 
@@ -54,10 +55,15 @@ void UBFL_HTTPHelper::FetchToken(FString RequestURL, int64 uid, FString ChannelN
 
 	// Send Request
 	Request->ProcessRequest();
+
+#endif
 }
 
 void UBFL_HTTPHelper::HandleRequest(FHttpRequestPtr RequestPtr, FHttpResponsePtr ResponsePtr, bool bIsSuccess, std::function<void(FString, bool)> Callback)
 {
+
+#if AG_UE427_OR_LATER
+
 	if (!EHttpResponseCodes::IsOk(ResponsePtr->GetResponseCode())) {
 		Callback("", false);
 		return;
@@ -81,4 +87,6 @@ void UBFL_HTTPHelper::HandleRequest(FHttpRequestPtr RequestPtr, FHttpResponsePtr
 	}
 
 	Callback("", false);
+
+#endif
 }
diff --git a/Agora-Unreal-SDK-CPP-Example/Source/AgoraExample/Utility/BFL_UtilityTool.cpp b/Agora-Unreal-SDK-CPP-Example/Source/AgoraExample/Utility/BFL_UtilityTool.cpp
index 3eb65642..51ca06c5 100644
--- a/Agora-Unreal-SDK-CPP-Example/Source/AgoraExample/Utility/BFL_UtilityTool.cpp
+++ b/Agora-Unreal-SDK-CPP-Example/Source/AgoraExample/Utility/BFL_UtilityTool.cpp
@@ -3,6 +3,7 @@
 
 #include "BFL_UtilityTool.h"
 #include "MediaPlayer.h"
+#include "Misc/EngineVersion.h"
 
 FString UBFL_UtilityTool::ConvertToAbsolutePath(FString InRelativePath, bool bAndroidUseInternalBasePath /*= false*/)
 {
@@ -96,6 +97,16 @@ FString UBFL_UtilityTool::GenSimpleUIDPart_FuncCode(EUIDFuncType Type)
 	return  "00" + FString::FromInt(ValType);
 }
 
+FString UBFL_UtilityTool::GetAgoraSaveDataSlotName()
+{
+	FEngineVersion EngineVersion = FEngineVersion::Current();
+	FString VersionString = EngineVersion.ToString(EVersionComponent::Patch);
+	// UE_LOG(LogTemp, Log, TEXT("Current Engine Version: %s"), *VersionString);
+
+	FString SlotName = "AgoraSaveData_" + VersionString;
+	return SlotName;
+}
+
 void UBFL_UtilityTool::SetCBSTextColor(UComboBoxString* CBSPtr)
 {
 	// Because in UE5.2.1, the default style of ComboBoxString is the black text on the black background.
diff --git a/Agora-Unreal-SDK-CPP-Example/Source/AgoraExample/Utility/BFL_UtilityTool.h b/Agora-Unreal-SDK-CPP-Example/Source/AgoraExample/Utility/BFL_UtilityTool.h
index 526c333e..f9191fb6 100644
--- a/Agora-Unreal-SDK-CPP-Example/Source/AgoraExample/Utility/BFL_UtilityTool.h
+++ b/Agora-Unreal-SDK-CPP-Example/Source/AgoraExample/Utility/BFL_UtilityTool.h
@@ -33,6 +33,9 @@ class AGORAEXAMPLE_API UBFL_UtilityTool : public UBlueprintFunctionLibrary
 
 	static FString GenSimpleUIDPart_FuncCode(EUIDFuncType Type);
 
+
+	static FString GetAgoraSaveDataSlotName();
+
 	UFUNCTION(BlueprintCallable, Category = "Utility")
 	static void SetCBSTextColor(UComboBoxString* CBSPtr);
 };
diff --git a/Agora-Unreal-SDK-CPP-Example/Source/AgoraExampleEditor.Target.cs b/Agora-Unreal-SDK-CPP-Example/Source/AgoraExampleEditor.Target.cs
index 9999ed1b..b2ebbcc8 100644
--- a/Agora-Unreal-SDK-CPP-Example/Source/AgoraExampleEditor.Target.cs
+++ b/Agora-Unreal-SDK-CPP-Example/Source/AgoraExampleEditor.Target.cs
@@ -2,6 +2,7 @@
 
 using UnrealBuildTool;
 using System.Collections.Generic;
+using System;
 
 public class AgoraExampleEditorTarget : TargetRules
 {
@@ -28,12 +29,23 @@ public AgoraExampleEditorTarget( TargetInfo Target) : base(Target)
 
             // [-Wno-single-bit-bitfield-constant-conversion]: UE_4.27/Engine/Source/Runtime/Engine/Public/MaterialShared.h:2304:30: error: implicit truncation from 'int' to a one-bit wide bit-field changes value from 1 to -1 
             //  MarkedForGarbageCollection = 1;
-            // AdditionalCompilerArguments = "-Wno-unused-but-set-variable -Wno-gcc-compat -Wno-reorder-ctor -Wno-deprecated-builtins -Wno-bitwise-instead-of-logical -Wno-single-bit-bitfield-constant-conversion";
+
+            if (Target.Version.MajorVersion < 5)
+            {
+                AdditionalCompilerArguments = "-Wno-unused-but-set-variable -Wno-gcc-compat -Wno-reorder-ctor -Wno-deprecated-builtins -Wno-bitwise-instead-of-logical -Wno-single-bit-bitfield-constant-conversion";
+
+                Console.WriteLine("[Apply Compiler Arguments] For UE Ver < 5: AdditionalCompilerArguments: " + AdditionalCompilerArguments);
+            }
 
             // error: unknown warning option '-Wno-deprecated-builtins'; did you mean '-Wno-deprecated-volatile'? [-Werror,-Wunknown-warning-option]
             // error: unknown warning option '-Wno-single-bit-bitfield-constant-conversion'; did you mean '-Wno-bitfield-constant-conversion'? [-Werror,-Wunknown-warning-option]
-            AdditionalCompilerArguments = "-Wno-unused-but-set-variable -Wno-gcc-compat -Wno-reorder-ctor";
-            
+            else
+            {
+                AdditionalCompilerArguments = "-Wno-unused-but-set-variable -Wno-gcc-compat -Wno-reorder-ctor";
+
+                Console.WriteLine("[Apply Compiler Arguments] For UE Ver >= 5: AdditionalCompilerArguments: " + AdditionalCompilerArguments);
+            }
+
         }
     }
 }
diff --git a/Agora-Unreal-SDK-CPP/AgoraPlugin/Source/AgoraPlugin/Private/AgoraPlugin.cpp b/Agora-Unreal-SDK-CPP/AgoraPlugin/Source/AgoraPlugin/Private/AgoraPlugin.cpp
index 795045be..52dac324 100644
--- a/Agora-Unreal-SDK-CPP/AgoraPlugin/Source/AgoraPlugin/Private/AgoraPlugin.cpp
+++ b/Agora-Unreal-SDK-CPP/AgoraPlugin/Source/AgoraPlugin/Private/AgoraPlugin.cpp
@@ -12,13 +12,13 @@ DEFINE_LOG_CATEGORY(LogAgora);
 
 void FAgoraPluginModule::StartupModule()
 {
-	UE_LOG(LogAgora, Warning, TEXT("FAgoraPluginModule: %s"), *(AgoraUERtcEngine::GetSDKVersion()));
+	UE_LOG(LogAgora, Display, TEXT("FAgoraPluginModule - StartupModule: %s"), *(AgoraUERtcEngine::GetSDKVersion()));
 }
 
 void FAgoraPluginModule::ShutdownModule()
 {
-	//untested, so comment out the code for now
-	//AgoraUERtcEngine::Release();
+	AgoraUERtcEngine::Release();
+	UE_LOG(LogAgora, Display, TEXT("FAgoraPluginModule - ShutdownModule: Release RTC Engine"));
 }
 
 #undef LOCTEXT_NAMESPACE
diff --git a/Agora-Unreal-SDK-CPP/AgoraPlugin/Source/AgoraPlugin/Public/AgoraCppPlugin/AgoraHeaderBase.h b/Agora-Unreal-SDK-CPP/AgoraPlugin/Source/AgoraPlugin/Public/AgoraCppPlugin/AgoraHeaderBase.h
index 8a0ab97f..5fdd46fd 100644
--- a/Agora-Unreal-SDK-CPP/AgoraPlugin/Source/AgoraPlugin/Public/AgoraCppPlugin/AgoraHeaderBase.h
+++ b/Agora-Unreal-SDK-CPP/AgoraPlugin/Source/AgoraPlugin/Public/AgoraCppPlugin/AgoraHeaderBase.h
@@ -3,11 +3,12 @@
 #pragma once
 
 #include "Runtime/Launch/Resources/Version.h"
-#define AG_UE_5_4_OR_LATER   (ENGINE_MAJOR_VERSION == 5 && ENGINE_MINOR_VERSION >= 4) 
-#define AG_UE_5_3_OR_LATER   (ENGINE_MAJOR_VERSION == 5 && ENGINE_MINOR_VERSION >= 3)
-#define AG_UE_5_2_OR_LATER   (ENGINE_MAJOR_VERSION == 5 && ENGINE_MINOR_VERSION >= 2)
-#define AG_UE_5_1_OR_LATER   (ENGINE_MAJOR_VERSION == 5 && ENGINE_MINOR_VERSION >= 1)
-#define AG_UE5_OR_LATER   (ENGINE_MAJOR_VERSION == 5 && ENGINE_MINOR_VERSION >= 0)
+#define AG_UE_5_4_OR_LATER   (ENGINE_MAJOR_VERSION >= 5 && ENGINE_MINOR_VERSION >= 4) 
+#define AG_UE_5_3_OR_LATER   (ENGINE_MAJOR_VERSION >= 5 && ENGINE_MINOR_VERSION >= 3)
+#define AG_UE_5_2_OR_LATER   (ENGINE_MAJOR_VERSION >= 5 && ENGINE_MINOR_VERSION >= 2)
+#define AG_UE_5_1_OR_LATER   (ENGINE_MAJOR_VERSION >= 5 && ENGINE_MINOR_VERSION >= 1)
+#define AG_UE5_OR_LATER   (ENGINE_MAJOR_VERSION >= 5 && ENGINE_MINOR_VERSION >= 0)
+#define AG_UE427_OR_LATER   (ENGINE_MAJOR_VERSION >= 4 && ENGINE_MINOR_VERSION >= 27)
 
 // For compiling the plugin independently using UAT's BuildPlugin command
 #if PLATFORM_WINDOWS