diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 0a45669..b689a1b 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -62,7 +62,7 @@ jobs:
 
       - name: Build with PyInstaller
         run: |
-          pyinstaller --name video2gif --onefile --windowed --add-data "ffmpeg/ffmpeg.exe;ffmpeg" --add-data "ffmpeg/ffprobe.exe;ffmpeg" --add-data "README.md;." launcher.py
+          pyinstaller --name video2gif --onefile --windowed --add-data "ffmpeg/ffmpeg.exe;ffmpeg" --add-data "ffmpeg/ffprobe.exe;ffmpeg" --add-data "README.md;." gui.py
 
       - name: Upload Release Asset
         uses: softprops/action-gh-release@v1
diff --git a/gui.py b/gui.py
index 56a1040..dac0efe 100644
--- a/gui.py
+++ b/gui.py
@@ -9,21 +9,6 @@ from threading import Thread
 import ffmpeg
 import traceback
 
-# 根据平台选择拖放实现
-PLATFORM = platform.system().lower()
-
-if PLATFORM == "windows":
-    try:
-        from tkinterdnd2 import DND_FILES, TkinterDnD
-
-        SUPPORT_DND = "tkdnd"
-    except ImportError:
-        SUPPORT_DND = None
-elif PLATFORM == "darwin":  # macOS
-    SUPPORT_DND = "macos"
-else:  # Linux or others
-    SUPPORT_DND = None
-
 # 设置 FFmpeg 路径
 if getattr(sys, "frozen", False):
     # 运行在 PyInstaller 打包后的环境
@@ -35,19 +20,47 @@ else:
 if ffmpeg_path not in os.environ["PATH"]:
     os.environ["PATH"] = ffmpeg_path + os.pathsep + os.environ["PATH"]
 
+# 尝试导入拖放支持
+SUPPORT_DND = False
+if platform.system().lower() == "windows":
+    try:
+        from tkinterdnd2 import DND_FILES, TkinterDnD
+
+        SUPPORT_DND = True
+    except ImportError:
+        pass
+
 
 class VideoToGifConverter:
     def __init__(self):
         # 创建主窗口
-        if SUPPORT_DND == "tkdnd":
-            self.root = TkinterDnD.Tk()
+        if SUPPORT_DND:
+            try:
+                self.root = TkinterDnD.Tk()
+            except Exception:
+                self.root = tk.Tk()
+                SUPPORT_DND = False
         else:
             self.root = tk.Tk()
 
         self.root.title("视频转GIF工具")
 
+        # 设置窗口大小和位置
+        window_width = 800
+        window_height = 600
+        screen_width = self.root.winfo_screenwidth()
+        screen_height = self.root.winfo_screenheight()
+        x = (screen_width - window_width) // 2
+        y = (screen_height - window_height) // 2
+        self.root.geometry(f"{window_width}x{window_height}+{x}+{y}")
+
         # 设置拖放支持
-        self.setup_dnd()
+        if SUPPORT_DND:
+            try:
+                self.root.drop_target_register(DND_FILES)
+                self.root.dnd_bind("<<Drop>>", self.handle_drop)
+            except Exception:
+                SUPPORT_DND = False
 
         # 设置UI
         self.setup_ui()
diff --git a/launcher.py b/launcher.py
deleted file mode 100644
index 51d70f9..0000000
--- a/launcher.py
+++ /dev/null
@@ -1,52 +0,0 @@
-import os
-import sys
-import traceback
-
-
-def get_ffmpeg_path():
-    if getattr(sys, "frozen", False):
-        # 运行在 PyInstaller 打包后的环境
-        return os.path.join(sys._MEIPASS, "ffmpeg")
-    else:
-        # 运行在开发环境
-        return os.path.join(os.path.dirname(os.path.abspath(__file__)), "ffmpeg")
-
-
-def setup_environment():
-    try:
-        # 设置 FFmpeg 路径
-        ffmpeg_path = get_ffmpeg_path()
-        if ffmpeg_path not in os.environ["PATH"]:
-            os.environ["PATH"] = ffmpeg_path + os.pathsep + os.environ["PATH"]
-
-        print(f"FFmpeg path: {ffmpeg_path}")
-        print(f"System PATH: {os.environ['PATH']}")
-    except Exception as e:
-        print(f"Error setting up environment: {str(e)}")
-        traceback.print_exc()
-
-
-if __name__ == "__main__":
-    try:
-        print("Starting Video2Gif Converter...")
-        print(f"Python version: {sys.version}")
-
-        setup_environment()
-
-        from gui import VideoToGifConverter
-
-        app = VideoToGifConverter()
-        app.run()
-    except Exception as e:
-        print(f"Error: {str(e)}")
-        traceback.print_exc()
-
-        # 写入错误日志
-        with open("error.log", "w") as f:
-            f.write(f"Error: {str(e)}\n")
-            f.write(traceback.format_exc())
-
-        # 如果是打包后的程序，等待用户确认
-        if getattr(sys, "frozen", False):
-            input("Press Enter to exit...")
-        sys.exit(1)