diff --git a/Unity Studio/Unity Classes/Texture2D.cs b/Unity Studio/Unity Classes/Texture2D.cs
index 3b8b198..7aa2899 100644
--- a/Unity Studio/Unity Classes/Texture2D.cs	
+++ b/Unity Studio/Unity Classes/Texture2D.cs	
@@ -738,6 +738,8 @@ namespace Unity_Studio
                     case TextureFormat.EAC_RG:
                     case TextureFormat.EAC_RG_SIGNED:
                         preloadData.extension = ".ktx"; break;
+                    default:
+                        preloadData.extension = ".dat"; break;
                 }
 
                 switch (m_FilterMode)
diff --git a/Unity Studio/Unity Studio Classes/UnityStudio.cs b/Unity Studio/Unity Studio Classes/UnityStudio.cs
index a447f48..3f12995 100644
--- a/Unity Studio/Unity Studio Classes/UnityStudio.cs	
+++ b/Unity Studio/Unity Studio Classes/UnityStudio.cs	
@@ -1595,7 +1595,7 @@ namespace Unity_Studio
             if (m_Texture2D.image_data == null)
                 return false;
             var convert = (bool)Properties.Settings.Default["convertTexture"];
-            if (convert)
+            if (convert && asset.extension != ".dat")
             {
                 ImageFormat format = null;
                 var ext = (string)Properties.Settings.Default["convertType"];
@@ -1863,7 +1863,7 @@ namespace Unity_Studio
             return false;
         }
 
-        private static string FixFileName(string str)
+        public static string FixFileName(string str)
         {
             if (str.Length >= 260) return Path.GetRandomFileName();
             return Path.GetInvalidFileNameChars().Aggregate(str, (current, c) => current.Replace(c, '_'));
diff --git a/Unity Studio/UnityStudioForm.cs b/Unity Studio/UnityStudioForm.cs
index 511ed00..65318f1 100644
--- a/Unity Studio/UnityStudioForm.cs	
+++ b/Unity Studio/UnityStudioForm.cs	
@@ -84,20 +84,32 @@ namespace Unity_Studio
             if (openFileDialog1.ShowDialog() == DialogResult.OK)
             {
                 resetForm();
-                mainPath = Path.GetDirectoryName(openFileDialog1.FileNames[0]);
                 ThreadPool.QueueUserWorkItem(state =>
                 {
+                    mainPath = Path.GetDirectoryName(openFileDialog1.FileNames[0]);
+                    var bundle = false;
                     if (openFileDialog1.FilterIndex == 1 || openFileDialog1.FilterIndex == 3)
                     {
-                        MergeSplitAssets(mainPath);
-
-                        //Only verify whether the first file is bundle file
                         if (CheckBundleFile(openFileDialog1.FileNames[0]))
                         {
-                            MessageBox.Show($"{Path.GetFileName(openFileDialog1.FileNames[0])} is bundle file, please select bundle file type to load this file");
-                            return;
+                            if (openFileDialog1.FileNames.Length > 1)
+                            {
+                                MessageBox.Show($"{Path.GetFileName(openFileDialog1.FileNames[0])} is bundle file, please select bundle file type to load this file");
+                                return;
+                            }
+                            else
+                            {
+                                bundle = true;
+                            }
                         }
-
+                    }
+                    else
+                    {
+                        bundle = true;
+                    }
+                    if (!bundle)
+                    {
+                        MergeSplitAssets(mainPath);
                         foreach (var i in openFileDialog1.FileNames)
                         {
                             unityFiles.Add(i);
@@ -1463,8 +1475,10 @@ namespace Unity_Studio
                                                 var filename = j.Text + DateTime.Now.ToString("_mm_ss_ffff");
                                                 //选中它和它的子节点
                                                 sceneTreeView.Invoke(new Action(() => j.Checked = true));
+                                                //处理非法文件名
+                                                var name = FixFileName(savePath + filename + ".fbx");
                                                 //导出FBX
-                                                WriteFBX(savePath + filename + ".fbx", false);
+                                                WriteFBX(name, false);
                                                 //取消选中
                                                 sceneTreeView.Invoke(new Action(() => j.Checked = false));
                                             }
@@ -1916,9 +1930,7 @@ namespace Unity_Studio
             reverseSort = false;
             enableFiltering = false;
 
-            //FMODinit();
             FMODreset();
-
         }
 
         private void showOriginalFileToolStripMenuItem_Click(object sender, EventArgs e)