diff --git a/mixly-sw/mixly-modules/common/setting.js b/mixly-sw/mixly-modules/common/setting.js
index 67d5f700..dbf877e0 100644
--- a/mixly-sw/mixly-modules/common/setting.js
+++ b/mixly-sw/mixly-modules/common/setting.js
@@ -254,6 +254,9 @@ Setting.configMenuGetValue = (obj) => {
 Setting.refreshUpdateMenuStatus = (localVersion, cloudVersion, needsUpdate, url) => {
     const $serverDiv = $('#setting-menu-update-server');
     const $btnDiv = $('#setting-menu-update > div:nth-child(2)');
+    const $button = $btnDiv.children('button');
+    $button.removeClass('layui-btn-disabled');
+    $button.addClass('self-adaption-btn');
     const $mixlyProgress = $serverDiv.find('.mixly-progress');
     $serverDiv.find('span').css('display', 'none');
     $mixlyProgress.hide();
@@ -269,7 +272,9 @@ Setting.refreshUpdateMenuStatus = (localVersion, cloudVersion, needsUpdate, url)
     }
     if (needsUpdate) {
         $btnDiv.css('display', 'flex');
-        $btnDiv.children('button').off().one('click', (event) => {
+        $button.off().one('click', (event) => {
+            $button.addClass('layui-btn-disabled');
+            $button.removeClass('self-adaption-btn');
             const eventSource = new EventSource(`/api/download?url=${encodeURIComponent(url)}&cloudVersion=${cloudVersion}`);
             $mixlyProgress.show();
             eventSource.onmessage = function(event) {
diff --git a/static-server/api.js b/static-server/api.js
index a663816c..28dad8a2 100644
--- a/static-server/api.js
+++ b/static-server/api.js
@@ -172,72 +172,106 @@ router.get('/download', async (req, res) => {
     try {
         const { url, cloudVersion } = req.query;
 
-        if(fs.existsSync(TEMP_FOLDER_PATH)) {
+        // 清理临时文件夹
+        if (fs.existsSync(TEMP_FOLDER_PATH)) {
             deleteFolderRecursive(TEMP_FOLDER_PATH);
         }
-        fs.mkdirSync(TEMP_FOLDER_PATH);
+        fs.mkdirSync(TEMP_FOLDER_PATH, { recursive: true });
+
         const filePath = path.resolve(TEMP_FOLDER_PATH, 'mixly.zip');
         const fileStream = fs.createWriteStream(filePath);
 
-        // 设置响应头
+        // 设置 SSE 响应头
         res.setHeader('Content-Type', 'text/event-stream');
-        res.setHeader('Transfer-Encoding', 'chunked');
+        res.setHeader('Cache-Control', 'no-cache');
+        res.setHeader('Connection', 'keep-alive');
+        res.flushHeaders();
 
-        // 发起下载请求
+        // 发起下载请求 - 添加 NW.js 特定配置
         const response = await axios({
             method: 'GET',
             url: url,
-            responseType: 'stream'
+            responseType: 'stream',
+            timeout: 60000,
+            headers: {
+                'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36'
+            },
+            adapter: require('axios/lib/adapters/http')
         });
 
-        const totalSize = parseInt(response.headers['content-length'], 10);
+        const totalSize = parseInt(response.headers['content-length'], 10) || 0;
+
         let downloadedSize = 0;
         let lastProgress = 0;
+
         // 发送进度信息
         const sendProgress = (progress) => {
-            if(progress !== lastProgress) {
-                res.write('data:' + JSON.stringify({ type: 'progress', progress }) + '\n\n');
+            if (progress !== lastProgress) {
+                const data = JSON.stringify({ type: 'progress', progress });
+                res.write(`data: ${data}\n\n`);
                 lastProgress = progress;
             }
         };
 
-        // 发送解压信息
-        const sendUnzip = () => {
-            res.write('data:' + JSON.stringify({ type: 'unzip' }) + '\n\n');
-        };
-
-        // 发送完成信息
-        const sendComplete = (version) => {
-            res.write('data:' + JSON.stringify({ type: 'complete', version }) + '\n\n');
-            res.end();
-        };
+        // 管道流处理
         response.data.pipe(fileStream);
-        // 处理数据流
+
+        // 进度监控
         response.data.on('data', (chunk) => {
             downloadedSize += chunk.length;
-            const progress = Math.round((downloadedSize / totalSize) * 100);
-            sendProgress(progress);
+            if (totalSize > 0) {
+                const progress = Math.round((downloadedSize / totalSize) * 100);
+                sendProgress(progress);
+            }
         });
 
+        // 文件流完成
         fileStream.on('finish', async () => {
-            // 获取版本信息并保存
-            saveVersionInfo(cloudVersion);
-            sendUnzip();
+            console.log('文件下载完成，开始解压');
+            
+            // 发送解压信息
+            res.write(`data: ${JSON.stringify({ type: 'unzip' })}\n\n`);
+
             try {
                 const asyncZip = new AsyncAdmZip(filePath);
                 await asyncZip.extractAllTo(path.resolve(__dirname, '../'));
-                sendComplete(cloudVersion);
-                if(fs.existsSync(TEMP_FOLDER_PATH)) {
+                
+                // 保存版本信息
+                saveVersionInfo(cloudVersion);
+                
+                // 发送完成信息
+                res.write(`data: ${JSON.stringify({ type: 'complete', version: cloudVersion })}\n\n`);
+                
+                // 清理临时文件
+                if (fs.existsSync(TEMP_FOLDER_PATH)) {
                     deleteFolderRecursive(TEMP_FOLDER_PATH);
                 }
+                
+                res.end();
             } catch (error) {
-                console.log(error);
-                res.status(500).json({ error: '解压失败' });
+                console.error('解压失败:', error);
+                res.write(`data: ${JSON.stringify({ type: 'error', message: '解压失败' })}\n\n`);
+                res.end();
             }
         });
+
+        // 错误处理
+        response.data.on('error', (error) => {
+            console.error('下载流错误:', error);
+            res.write(`data: ${JSON.stringify({ type: 'error', message: '下载流错误' })}\n\n`);
+            res.end();
+        });
+
+        fileStream.on('error', (error) => {
+            console.error('文件流错误:', error);
+            res.write(`data: ${JSON.stringify({ type: 'error', message: '文件保存错误' })}\n\n`);
+            res.end();
+        });
+
     } catch (error) {
-        console.log(error.message);
-        res.status(500).json({ error: '下载失败' });
+        console.error('下载过程错误:', error);
+        res.write(`data: ${JSON.stringify({ type: 'error', message: '下载失败: ' + error.message })}\n\n`);
+        res.end();
     }
 });