diff --git a/GPK_RePack/Editors/TextureTools.cs b/GPK_RePack/Editors/TextureTools.cs
index 99333b3..a7aed37 100644
--- a/GPK_RePack/Editors/TextureTools.cs
+++ b/GPK_RePack/Editors/TextureTools.cs
@@ -30,7 +30,7 @@ public static void exportTexture(GpkExport export, string file)
                 if (image == null || ddsFile == null)
                     return;
 
-                image.SaveObject(file, new DdsSaveConfig(image.GetFormat(), 0, 0, false, false));
+                image.SaveObject(file, new DdsSaveConfig(image.parsedImageFormat, 0, 0, false, false));
             }
             catch (Exception ex)
             {
@@ -47,7 +47,7 @@ public static void importTexture(GpkExport export, string file)
                 var texture2d = export.Payload as Texture2D;
 
                 var image = new DdsFile();
-                var config = new DdsSaveConfig(texture2d.GetFormat(), 0, 0, false, false);
+                var config = new DdsSaveConfig(texture2d.parsedImageFormat, 0, 0, false, false);
                 image.Load(file);
 
                 if (image.MipMaps.Count == 0 || Settings.Default.GenerateMipMaps)
diff --git a/GPK_RePack/Forms/GUI.cs b/GPK_RePack/Forms/GUI.cs
index 0e2872f..2293a06 100644
--- a/GPK_RePack/Forms/GUI.cs
+++ b/GPK_RePack/Forms/GUI.cs
@@ -1505,6 +1505,7 @@ private Dictionary<String, List<CompositeMapEntry>> filterCompositeList(string t
             }
             catch (Exception ex)
             {
+                logger.Error(ex, "filter fail");
                 return gpkStore.CompositeMap;
             }
         }
diff --git a/GPK_RePack/IO/MassDumper.cs b/GPK_RePack/IO/MassDumper.cs
index 27c1318..2d9d142 100644
--- a/GPK_RePack/IO/MassDumper.cs
+++ b/GPK_RePack/IO/MassDumper.cs
@@ -161,7 +161,10 @@ public static void DumpMassTextures(GpkStore store, String outdir, Dictionary<St
                             logger.Info("Extracted texture {0} to {1}", entry.UID, imagePath);
                         }
 
+                        //remove ref to ease gc
+                        exports.Clear();
                         package = null;
+
                         runningTasks.Remove(newTask);
                     });
 
diff --git a/GPK_RePack/Model/Payload/Texture2D.cs b/GPK_RePack/Model/Payload/Texture2D.cs
index 5b74f15..eb33c0b 100644
--- a/GPK_RePack/Model/Payload/Texture2D.cs
+++ b/GPK_RePack/Model/Payload/Texture2D.cs
@@ -21,12 +21,11 @@ class Texture2D : IPayload
     {
         private static Logger logger = LogManager.GetCurrentClassLogger();
 
-        public GpkExport objectExport;
         public byte[] startUnk;
         public string tgaPath;
         public bool inUnicode = false;
         public byte[] guid;
-
+        public FileFormat parsedImageFormat;
 
         private const CompressionTypes NothingToDo = CompressionTypes.Unused | CompressionTypes.StoreInSeparatefile;
 
@@ -69,7 +68,7 @@ public void WriteData(BinaryWriter writer, GpkPackage package, GpkExport export)
                     int chunkSize = 16 + map.blocks.Count * 8 + map.compressedSize;
                     if (chunkSize != map.compChunkSize)
                     {
-                        logger.Debug("fixing chunksize for " + objectExport.ObjectName);
+                        logger.Debug("fixing chunksize for " + export.ObjectName);
                         map.compChunkSize = chunkSize;
                     }
 
@@ -124,10 +123,10 @@ public void WriteData(BinaryWriter writer, GpkPackage package, GpkExport export)
 
         public void ReadData(GpkPackage package, GpkExport export)
         {
-            objectExport = export;
             BinaryReader reader = new BinaryReader(new MemoryStream(export.Data));
             IProperty formatProp = export.Properties.Find(t => ((GpkBaseProperty)t).name == "Format");
             String format = ((GpkByteProperty)formatProp).nameValue;
+            SaveFormat(export);
 
             startUnk = reader.ReadBytes(12);
             int mipMapCountOffset = reader.ReadInt32();
@@ -308,14 +307,18 @@ public override string ToString()
         }
 
 
-        public FileFormat GetFormat()
+        public void SaveFormat(GpkExport export)
         {
-            GpkByteProperty formatProp = objectExport.GetProperty("Format") as GpkByteProperty;
-            if (formatProp == null) return FileFormat.Unknown;
-
-            string format = formatProp.nameValue;
-
-            return DdsPixelFormat.ParseFileFormat(format);
+            GpkByteProperty formatProp = export.GetProperty("Format") as GpkByteProperty;
+            if (formatProp == null)
+            {
+                parsedImageFormat = FileFormat.Unknown;
+            }
+            else
+            {
+                string format = formatProp.nameValue;
+                parsedImageFormat = DdsPixelFormat.ParseFileFormat(format);
+            }
         }
 
         public Stream GetObjectStream()
@@ -332,7 +335,7 @@ public Stream GetObjectStream()
         private Stream buildDdsImage(int mipMapIndex)
         {
             MipMap mipMap = maps[mipMapIndex];
-            DdsHeader ddsHeader = new DdsHeader(new DdsSaveConfig(GetFormat(), 0, 0, false, false), mipMap.sizeX, mipMap.sizeY);
+            DdsHeader ddsHeader = new DdsHeader(new DdsSaveConfig(parsedImageFormat, 0, 0, false, false), mipMap.sizeX, mipMap.sizeY);
 
             MemoryStream stream = new MemoryStream();
             BinaryWriter writer = new BinaryWriter(stream);
@@ -353,7 +356,7 @@ public void SaveObject(string filename, object configuration)
                 if (maps == null || !maps.Any()) return;
 
                 DdsSaveConfig config = configuration as DdsSaveConfig ?? new DdsSaveConfig(FileFormat.Unknown, 0, 0, false, false);
-                config.FileFormat = GetFormat();
+                config.FileFormat = parsedImageFormat;
 
                 //parse uncompressed image
                 DdsFile ddsImage = new DdsFile(GetObjectStream());
diff --git a/GPK_RePack/Model/Prop/GpkBaseProperty.cs b/GPK_RePack/Model/Prop/GpkBaseProperty.cs
index 9789406..720eef5 100644
--- a/GPK_RePack/Model/Prop/GpkBaseProperty.cs
+++ b/GPK_RePack/Model/Prop/GpkBaseProperty.cs
@@ -9,7 +9,6 @@ class GpkBaseProperty
         public string type; //long index
         public int size;
         public int arrayIndex;
-        public object value;
 
         public GpkBaseProperty()
         {