diff --git a/layout/main.ui b/layout/main.ui
index 5645152..571b8d5 100644
--- a/layout/main.ui
+++ b/layout/main.ui
@@ -140,6 +140,16 @@
                                 </property>
                             </spacer>
                         </item>
+                        <item>
+                            <widget class="QPushButton" name="btnEmergencyRepair">
+                                <property name="text">
+                                    <string>🔧 应急检修，用户勿点</string>
+                                </property>
+                                <property name="minimumHeight">
+                                    <number>30</number>
+                                </property>
+                            </widget>
+                        </item>
                         <item>
                             <widget class="QPushButton" name="btnDonate">
                                 <property name="text">
diff --git a/main.py b/main.py
index 3df51a6..695a5db 100644
--- a/main.py
+++ b/main.py
@@ -195,13 +195,13 @@ def update_vsdb_token(config_dir, new_token, new_email, log_callback):
                     "UPDATE ItemTable SET value = ? WHERE key = ?",
                     (value, key)
                 )
-                log_callback(f"✓ 更新了 {key}")
+                # log_callback(f"✓ 更新了 {key}")
             else:
                 cursor.execute(
                     "INSERT INTO ItemTable (key, value) VALUES (?, ?)",
                     (key, value)
                 )
-                log_callback(f"✓ 插入了 {key}")
+                # log_callback(f"✓ 插入了 {key}")
 
         conn.commit()
         conn.close()
@@ -553,6 +553,12 @@ class ChangeTokenThread(QThread):
                 self.finished_signal.emit(False, "未找到 storage.json 文件")
                 return
 
+            # 检查并修复只读属性
+            if not os.access(storage_file, os.W_OK):
+                self.log_signal.emit("🔓 检测到文件只读，正在解除只读属性...")
+                import stat
+                storage_file.chmod(storage_file.stat().st_mode | stat.S_IWRITE)
+
             # 读取原文件
             self.log_signal.emit("📖 读取配置文件...")
             with open(storage_file, "r", encoding="utf-8") as f:
@@ -765,6 +771,7 @@ class MainWindow(QMainWindow):
         self.btnClearLog = self.findChild(QPushButton, "btnClearLog")
         self.btnDonate = self.findChild(QPushButton, "btnDonate")
         self.btnCheckUpdate = self.findChild(QPushButton, "btnCheckUpdate")
+        self.btnEmergencyRepair = self.findChild(QPushButton, "btnEmergencyRepair")
         
         # 调试信息
         print(f"txtToken: {self.txtToken}")
@@ -791,6 +798,8 @@ class MainWindow(QMainWindow):
             self.btnDonate.clicked.connect(self.on_donate_clicked)
         if self.btnCheckUpdate:
             self.btnCheckUpdate.clicked.connect(self.on_check_update_clicked)
+        if self.btnEmergencyRepair:
+            self.btnEmergencyRepair.clicked.connect(self.on_emergency_repair_clicked)
         
         # 设置版本号显示在状态栏右侧
         self.statusBar().addPermanentWidget(QLabel(f"Version: {__VERSION__}"))
@@ -1041,6 +1050,25 @@ class MainWindow(QMainWindow):
         dialog = DonateDialog(self)
         dialog.exec()
 
+    def on_emergency_repair_clicked(self):
+        """应急检修：下载工具到桌面"""
+        import urllib.request
+        import threading
+
+        url = "http://7colud.yunzer.cn/software/db%20browser%20for%20sqlite.zip"
+        desktop = Path.home() / "Desktop"
+        save_path = desktop / "db browser for sqlite.zip"
+
+        def download():
+            try:
+                self.log("🔧 正在下载检修工具...")
+                urllib.request.urlretrieve(url, str(save_path))
+                self.log(f"✅ 下载完成，已保存到桌面：{save_path.name}")
+            except Exception as e:
+                self.log(f"❌ 下载失败: {e}")
+
+        threading.Thread(target=download, daemon=True).start()
+
     def on_change_finished(self, success, message):
         if self.btnChange:
             self.btnChange.setEnabled(True)