diff --git a/Source/GameSaving.cs b/Source/GameSaving.cs
index bfc5df7..ac15ab3 100644
--- a/Source/GameSaving.cs
+++ b/Source/GameSaving.cs
@@ -227,7 +227,13 @@ private static Part[] LoadParts(GameSaving.VesselSave vesselToLoad)
 				array[i].orientation = vesselToLoad.parts[i].orientation;
 
                 array[i].partData.tags = new Dictionary<string, object>();
-                array[i].partData.GUID = vesselToLoad.parts[i].GUID;
+                try
+                {
+                    array[i].partData.GUID = new Guid(vesselToLoad.parts[i].GUID);
+                } catch
+                {
+                    array[i].partData.GUID = Guid.NewGuid();
+                }
                 try
                 {
                     if (vesselToLoad.parts[i].tagsString != null)
diff --git a/Source/NewBuildSystem/Build.cs b/Source/NewBuildSystem/Build.cs
index c65043a..da3781d 100644
--- a/Source/NewBuildSystem/Build.cs
+++ b/Source/NewBuildSystem/Build.cs
@@ -799,7 +799,7 @@ public PlacedPartSave(PlacedPart part)
 					this.partName = part.partData.name;
 					this.position = part.position;
 					this.orientation = part.orientation;
-                    this.GUID = part.partData.GUID;
+                    this.GUID = part.partData.GUID.ToString();
 
                     //Tags formatting for save
                     StringBuilder stringBuilder = new StringBuilder();
@@ -837,7 +837,13 @@ public static List<PlacedPart> FromSave(List<Build.BuildSave.PlacedPartSave> par
 						bool flag = partByName != null;
 						if (flag)
 						{
-                            partByName.GUID = parts[i].GUID;
+                            try
+                            {
+                                partByName.GUID = new Guid(parts[i].GUID);
+                            } catch
+                            {
+                                partByName.GUID = Guid.NewGuid();
+                            }
                             //Tags parsing from text back to a Dictionary
                             partByName.tags = new Dictionary<string, object>();
                             try
@@ -893,7 +899,7 @@ public static List<PlacedPart> FromSave(List<Build.BuildSave.PlacedPartSave> par
                 //Custom field for custom values saving
                 public string tagsString;
 
-                public Guid GUID;
+                public string GUID;
             }
 		}
 	}
diff --git a/Source/NewBuildSystem/PartData.cs b/Source/NewBuildSystem/PartData.cs
index dc590d4..c18a2cb 100644
--- a/Source/NewBuildSystem/PartData.cs
+++ b/Source/NewBuildSystem/PartData.cs
@@ -85,7 +85,7 @@ public void OnValidate()
         //Custom field for custom values saving
         public Dictionary<string, object> tags = new Dictionary<string, object>();
 
-        public Guid GUID = new Guid();
+        public Guid GUID = Guid.NewGuid();
 
         [Space]
 		public PartData.Area[] areas;
diff --git a/Source/NewBuildSystem/PartGrid.cs b/Source/NewBuildSystem/PartGrid.cs
index 663b65f..a1b8b94 100644
--- a/Source/NewBuildSystem/PartGrid.cs
+++ b/Source/NewBuildSystem/PartGrid.cs
@@ -577,7 +577,7 @@ public float GetThrust()
             return num;
         }
 
-        private float GetMass()
+        public float GetMass()
         {
             float num = 0f;
             for (int i = 0; i < this.parts.Count; i++)
diff --git a/Source/Part.cs b/Source/Part.cs
index 952be7b..e12195d 100644
--- a/Source/Part.cs
+++ b/Source/Part.cs
@@ -445,7 +445,7 @@ public Save(Part part, Orientation orientation, List<Part> parts)
                 }));
             }
             this.tagsString = sb.ToString();
-            this.GUID = part.partData.GUID;
+            this.GUID = part.partData.GUID.ToString();
         }
 
 		[Header("Part")]
@@ -457,6 +457,6 @@ public Save(Part part, Orientation orientation, List<Part> parts)
 
         public string tagsString;
 
-        public Guid GUID;
+        public string GUID;
     }
 }
diff --git a/Source/SFSML/ModLoader.cs b/Source/SFSML/ModLoader.cs
index a8af921..9ebf087 100644
--- a/Source/SFSML/ModLoader.cs
+++ b/Source/SFSML/ModLoader.cs
@@ -363,7 +363,7 @@ static ModLoader()
 
 		public MyConsole myConsole;
 
-		public static readonly string version = "1.3.1";
+		public static readonly string version = "1.3.5";
 
 		private static string logTag = "ModLoader " + ModLoader.version;
 
diff --git a/Source/SFSML/Translation/Languages/ModLoaderLang.cs b/Source/SFSML/Translation/Languages/ModLoaderLang.cs
index b6e04ba..05cab14 100644
--- a/Source/SFSML/Translation/Languages/ModLoaderLang.cs
+++ b/Source/SFSML/Translation/Languages/ModLoaderLang.cs
@@ -8,9 +8,9 @@ public ModLoaderLang()
 		{
 		}
 
-		public string Version = "1.3.1";
+		public string Version = "1.3.5";
 
-		public string LoaderTag = "Hydria [1.3.1]";
+		public string LoaderTag = "Hydria [%Version%]";
 
 		public string LoaderVersion = "1.3.1";
 
diff --git a/Source/SFSML/Utility/IMGUIUtil.cs b/Source/SFSML/Utility/IMGUIUtil.cs
index 1e0ff6a..c98ded8 100644
--- a/Source/SFSML/Utility/IMGUIUtil.cs
+++ b/Source/SFSML/Utility/IMGUIUtil.cs
@@ -5,7 +5,7 @@
 
 namespace SFSML.Utility
 {
-    static class IMGUIUtil
+    public static class IMGUIUtil
     {
         private static int ID = int.MaxValue;
 
diff --git a/Source/obj/Debug/Assembly-CSharp.dll b/Source/obj/Debug/Assembly-CSharp.dll
index dc84159..a5ef198 100644
Binary files a/Source/obj/Debug/Assembly-CSharp.dll and b/Source/obj/Debug/Assembly-CSharp.dll differ
diff --git a/Source/obj/Debug/Assembly-CSharp.pdb b/Source/obj/Debug/Assembly-CSharp.pdb
index beaa31d..4f83286 100644
Binary files a/Source/obj/Debug/Assembly-CSharp.pdb and b/Source/obj/Debug/Assembly-CSharp.pdb differ