diff --git a/src/main/index.ts b/src/main/index.ts
index 2e572f2..74a44d3 100644
--- a/src/main/index.ts
+++ b/src/main/index.ts
@@ -297,7 +297,12 @@ app.whenReady().then(async () => {
         const nextWechatDb = await WechatDb.create(key, settings.dbRoot)
         const resolvedRoot = nextWechatDb.getWcdb4Client().getAccountRoot()
         if (resolvedRoot && resolvedRoot !== settings.dbRoot) {
-          saveSettings({ ...settings, dbRoot: resolvedRoot })
+          // 同步更新 imageKeyRoot，避免自动获取图片密钥时扫描到错误目录
+          saveSettings({
+            ...settings,
+            dbRoot: resolvedRoot,
+            imageKeyRoot: resolvedRoot
+          })
         }
         chat.setChatDb(nextWechatDb)
         const wcdb4Client = nextWechatDb.getWcdb4Client()
@@ -411,7 +416,13 @@ app.whenReady().then(async () => {
   ipcMain.handle('key:autoGetImageKey', async (event, options?: { save?: boolean }) => {
     const settings = loadSettings()
     const self = chat.getSelfAccountInfo()
-    const accountRoot = settings.imageKeyRoot || self?.accountRoot || settings.dbRoot
+    // 优先级：chat 真实识别到的根 → self.accountRoot → settings.imageKeyRoot → settings.dbRoot
+    // 必须先看 chat.getCurrentAccountRoot()，否则 settings 缓存漂移会导致扫错目录。
+    const accountRoot =
+      chat.getCurrentAccountRoot() ||
+      self?.accountRoot ||
+      settings.imageKeyRoot ||
+      settings.dbRoot
     const wxid = self?.wxid
     const onStatus = (message: string): void => {
       if (!event.sender.isDestroyed()) event.sender.send('key:imageKeyStatus', { message })
@@ -788,6 +799,11 @@ app.whenReady().then(async () => {
   ipcMain.handle('db:reopenWithRoot', (_, accountRoot: string) => {
     const ok = chat.reopenWithRoot(accountRoot)
     if (!ok) return { success: false, error: '数据库未初始化或重新打开失败' }
+    // 同步 imageKeyRoot，避免自动获取扫描到旧目录
+    const settings = loadSettings()
+    if (accountRoot && accountRoot !== settings.imageKeyRoot) {
+      saveSettings({ ...settings, imageKeyRoot: accountRoot })
+    }
     const info = chat.getSelfAccountInfo()
     return { success: true, info }
   })
diff --git a/src/main/services/settings-store.ts b/src/main/services/settings-store.ts
index 5d6a61e..fc135c5 100644
--- a/src/main/services/settings-store.ts
+++ b/src/main/services/settings-store.ts
@@ -4,6 +4,22 @@ import path from 'path'
 import os from 'os'
 import { discoverWindowsDbRoots } from '../windows-db-root-discovery'
 
+/**
+ * 把 V3 时代的 "...\\Documents\\WeChat Files" 路径重定向到
+ * "...\\Documents\\xwechat_files"（V4）。如果 xwechat_files 不存在则保留原值。
+ * 仅支持 WeChat 4.0：自动纠正用户机器上残留的旧路径。
+ */
+function redirectLegacyWeChatFilesToXwechat(candidate: string): string {
+  if (!candidate) return candidate
+  const normalized = candidate.replace(/[\\/]+$/, '')
+  const lowered = normalized.toLowerCase()
+  const legacyMarker = `${path.sep}wechat files`
+  if (!lowered.endsWith(legacyMarker)) return candidate
+  const redirected = `${normalized.slice(0, -legacyMarker.length)}${path.sep}xwechat_files`
+  if (fs.existsSync(redirected)) return redirected
+  return candidate
+}
+
 export interface AppSettings {
   dbRoot: string
   apiEnabled: boolean
@@ -25,16 +41,17 @@ function getDefaultDbRoot(): string {
 
 function getDefaultDbRootCandidates(home: string): string[] {
   if (process.platform !== 'win32') {
+    // macOS 仅支持 WeChat 4.0 路径（xwechat_files）
     return [
       path.join(home, 'Library/Containers/com.tencent.xinWeChat/Data/Documents/xwechat_files')
     ]
   }
 
+  // 仅支持 WeChat 4.0：剔除 V3 时代的 "WeChat Files" 目录，
+  // 只认 xwechat_files（含 Documents\ 和 AppData\Roaming\Tencent\ 两种合法位置）。
   const candidates = [
     ...getWeflowDbPathCandidates(home),
-    path.join(home, 'Documents', 'WeChat Files'),
     path.join(home, 'Documents', 'xwechat_files'),
-    path.join(home, 'WeChat Files'),
     path.join(os.homedir(), 'AppData', 'Roaming', 'Tencent', 'xwechat_files')
   ]
 
@@ -123,9 +140,19 @@ export function loadSettings(): AppSettings {
       if (process.platform === 'win32' && !isUsableDbRoot(cache.dbRoot)) {
         cache.dbRoot = getDefaultDbRoot()
       }
-      if (!cache.imageKeyRoot) {
+      // 同步：imageKeyRoot 必须跟随 dbRoot 更新，
+      // 否则自动获取会扫错目录（旧 bug：状态面板显示 D 盘，自动获取扫 C 盘）。
+      if (!cache.imageKeyRoot || !isUsableDbRoot(cache.imageKeyRoot)) {
         cache.imageKeyRoot = cache.dbRoot
       }
+      // V4-only 兜底：如果 imageKeyRoot 指向旧的 "WeChat Files"（V3 路径），
+      // 重定向到同一父目录下的 xwechat_files（V4）。
+      if (cache.imageKeyRoot) {
+        cache.imageKeyRoot = redirectLegacyWeChatFilesToXwechat(cache.imageKeyRoot)
+      }
+      if (cache.dbRoot) {
+        cache.dbRoot = redirectLegacyWeChatFilesToXwechat(cache.dbRoot)
+      }
       return cache
     }
   } catch (error) {
diff --git a/src/main/wcdb4-client.ts b/src/main/wcdb4-client.ts
index dcf065f..e10504d 100644
--- a/src/main/wcdb4-client.ts
+++ b/src/main/wcdb4-client.ts
@@ -311,11 +311,10 @@ export class Wcdb4Client {
   private static getDefaultRootCandidates(): string[] {
     const home = os.homedir()
     if (process.platform === 'win32') {
+      // 仅支持 WeChat 4.0：只认 xwechat_files，V3 时代的 "WeChat Files" 不再加入候选
       const candidates = [
         ...Wcdb4Client.getWeflowDbPathCandidates(home),
-        path.join(home, 'Documents', 'WeChat Files'),
         path.join(home, 'Documents', 'xwechat_files'),
-        path.join(home, 'WeChat Files'),
         path.join(home, 'AppData', 'Roaming', 'Tencent', 'xwechat_files')
       ]
       candidates.push(...discoverWindowsDbRoots())
diff --git a/src/main/windows-db-root-discovery.ts b/src/main/windows-db-root-discovery.ts
index aa74fb8..5da052e 100644
--- a/src/main/windows-db-root-discovery.ts
+++ b/src/main/windows-db-root-discovery.ts
@@ -1,7 +1,8 @@
 import fs from 'fs-extra'
 import path from 'path'
 
-const DB_ROOT_NAMES = new Set(['xwechat_files', 'wechat files'])
+// 仅支持 WeChat 4.0：只扫描 xwechat_files；旧 V3 时代的 "WeChat Files" 不再纳入候选
+const DB_ROOT_NAMES = new Set(['xwechat_files'])
 const SKIPPED_DIRECTORY_NAMES = new Set([
   '$recycle.bin',
   'system volume information',