diff --git a/AssetStudio/AssetStudioForm.cs b/AssetStudio/AssetStudioForm.cs
index 0ea2f27..0915e94 100644
--- a/AssetStudio/AssetStudioForm.cs
+++ b/AssetStudio/AssetStudioForm.cs
@@ -836,7 +836,7 @@ namespace AssetStudio
                 case ClassIDType.MonoBehaviour:
                     {
                         var m_MonoBehaviour = new MonoBehaviour(asset);
-                        if (asset.serializedType.m_Nodes != null)
+                        if (asset.serializedType?.m_Nodes != null)
                         {
                             textPreviewBox.Text = asset.Dump();
                         }
diff --git a/AssetStudio/Classes/BuildSettings.cs b/AssetStudio/Classes/BuildSettings.cs
index ae748d5..a4157a9 100644
--- a/AssetStudio/Classes/BuildSettings.cs
+++ b/AssetStudio/Classes/BuildSettings.cs
@@ -11,34 +11,17 @@ namespace AssetStudio
 
         public BuildSettings(AssetPreloadData preloadData) : base(preloadData)
         {
-            int levels = reader.ReadInt32();
-            for (int l = 0; l < levels; l++)
+            int levelsNum = reader.ReadInt32();
+            for (int i = 0; i < levelsNum; i++)
             {
                 var level = reader.ReadAlignedString();
             }
 
-            if (version[0] >= 5)
-            {
-                int preloadedPlugins = reader.ReadInt32();
-                for (int l = 0; l < preloadedPlugins; l++)
-                {
-                    var preloadedPlugin = reader.ReadAlignedString();
-                }
-            }
+            var hasRenderTexture = reader.ReadBoolean();
+            var hasPROVersion = reader.ReadBoolean();
+            var hasPublishingRights = reader.ReadBoolean();
+            var hasShadows = reader.ReadBoolean();
 
-            reader.Position += 4;
-            if (version[0] >= 3) //3.0 and up
-            {
-                reader.Position += 4;
-            }
-            if (version[0] > 3 || (version[0] == 3 && version[1] >= 5))//3.5 and up
-            {
-                reader.Position += 4;
-            }
-            if (version[0] >= 5 || (version[0] == 4 && (version[1] >= 3 || (version[1] == 2 && buildType[0] != "a"))))
-            {
-                reader.Position += 4;
-            }
             m_Version = reader.ReadAlignedString();
         }
     }
diff --git a/AssetStudio/Classes/PlayerSettings.cs b/AssetStudio/Classes/PlayerSettings.cs
index 4844267..d09a891 100644
--- a/AssetStudio/Classes/PlayerSettings.cs
+++ b/AssetStudio/Classes/PlayerSettings.cs
@@ -12,62 +12,38 @@ namespace AssetStudio
 
         public PlayerSettings(AssetPreloadData preloadData) : base(preloadData)
         {
-            if ((version[0] == 5 && version[1] >= 4) || version[0] > 5)//5.4.0 nad up
+            if (version[0] > 5 || (version[0] == 5 && version[1] >= 4)) //5.4.0 nad up
             {
-                //productGUID
-                reader.ReadInt32();
-                reader.ReadInt32();
-                reader.ReadInt32();
-                reader.ReadInt32();
+                var productGUID = reader.ReadBytes(16);
             }
-            if (version[0] >= 3)
+
+            var AndroidProfiler = reader.ReadBoolean();
+            //bool AndroidFilterTouchesWhenObscured 2017.2 and up
+            //bool AndroidEnableSustainedPerformanceMode 2018 and up
+            reader.AlignStream(4);
+            int defaultScreenOrientation = reader.ReadInt32();
+            int targetDevice = reader.ReadInt32();
+            if (version[0] < 5 || (version[0] == 5 && version[1] < 3)) //5.3 down
             {
-                if (version[0] == 3 && version[1] < 2)
+                if (version[0] < 5) //5.0 down
                 {
-                    string AndroidLicensePublicKey = reader.ReadAlignedString();
-                }
-                else
-                {
-                    bool AndroidProfiler = reader.ReadBoolean(); reader.AlignStream(4);
-                }
-
-                int defaultScreenOrientation = reader.ReadInt32();
-                int targetDevice = reader.ReadInt32();
-
-                if (version[0] < 5 || (version[0] == 5 && version[1] < 1))
-                {
-                    int targetGlesGraphics = reader.ReadInt32();
-                }
-
-                if ((version[0] == 5 && version[1] < 1) || (version[0] == 4 && version[1] == 6 && version[2] >= 3))
-                {
-                    int targetIOSGraphics = reader.ReadInt32();
-                }
-
-                if (version[0] >= 5 || version[0] == 5 && (version[1] > 2 || (version[1] == 2 && version[2] >= 1)))
-                {
-                    bool useOnDemandResources = reader.ReadBoolean(); reader.AlignStream(4);
-                }
-
-                if (version[0] < 5 || (version[0] == 5 && version[1] < 3))
-                {
-                    int targetResolution = reader.ReadInt32();
-                }
-
-                if (version[0] == 3 && version[1] <= 1)
-                {
-                    bool OverrideIPodMusic = reader.ReadBoolean(); reader.AlignStream(4);
-                }
-                else if (version[0] == 3 && version[1] <= 4)
-                {
-
-                }
-                else//3.5.0 and up
-                {
-                    int accelerometerFrequency = reader.ReadInt32();
+                    int targetPlatform = reader.ReadInt32(); //4.0 and up targetGlesGraphics
+                    if (version[0] > 4 || (version[0] == 4 && version[1] >= 6)) //4.6 and up
+                    {
+                        var targetIOSGraphics = reader.ReadInt32();
+                    }
                 }
+                int targetResolution = reader.ReadInt32();
+            }
+            else
+            {
+                var useOnDemandResources = reader.ReadBoolean();
+                reader.AlignStream(4);
+            }
+            if (version[0] > 3 || (version[0] == 3 && version[1] >= 5)) //3.5 and up
+            {
+                var accelerometerFrequency = reader.ReadInt32();
             }
-            //fail in version 5 beta
             companyName = reader.ReadAlignedString();
             productName = reader.ReadAlignedString();
         }
diff --git a/AssetStudio/StudioClasses/AssetPreloadData.cs b/AssetStudio/StudioClasses/AssetPreloadData.cs
index e59e794..b9b4578 100644
--- a/AssetStudio/StudioClasses/AssetPreloadData.cs
+++ b/AssetStudio/StudioClasses/AssetPreloadData.cs
@@ -50,7 +50,7 @@ namespace AssetStudio
         public string Dump()
         {
             var reader = InitReader();
-            if (serializedType.m_Nodes != null)
+            if (serializedType?.m_Nodes != null)
             {
                 var sb = new StringBuilder();
                 TypeTreeHelper.ReadTypeString(sb, serializedType.m_Nodes, reader);
diff --git a/AssetStudio/StudioClasses/Exporter.cs b/AssetStudio/StudioClasses/Exporter.cs
index 64ed106..9d09976 100644
--- a/AssetStudio/StudioClasses/Exporter.cs
+++ b/AssetStudio/StudioClasses/Exporter.cs
@@ -107,7 +107,7 @@ namespace AssetStudio
                 return false;
             var m_MonoBehaviour = new MonoBehaviour(asset);
             string str;
-            if (asset.serializedType.m_Nodes != null)
+            if (asset.serializedType?.m_Nodes != null)
             {
                 str = asset.Dump();
             }