refine FAQs

en_us/docs/Users/Frequently Asked Questions.md

@@ -15,7 +15,7 @@ this.mathJaxScript = 'file://c:/Users/foo/mathjax/tex-svg.js';
 ```
 
 ## Crash After Version Update
-Open user configuration folder and delete all the contents in this folder (please backup your custom files if there is any). Then open VNote which should work fine now. Please import your notebooks into VNote again.
+This often happens if the update crosses multiple versions. Open user configuration folder and delete `vnotex.json`.
 
 ## Interface Is Freezed
 ## Cursor Is Not Visible in Edit Mode

zh_cn/docs/用户/常见问题.md

@@ -15,7 +15,7 @@ this.mathJaxScript = 'file://c:/Users/foo/mathjax/tex-svg.js';
 ```
 
 ## 更新后启动失败
-打开用户配置文件夹，并删除其中的内容（如果有自定义的文件，请先备份）。此时，打开新版本的 VNote，一般能正常工作。注意，这时候需要重新导入原来的笔记本。
+一般是由于跨多个版本号进行更新引起的。打开用户配置文件夹，并删除其中的 `vnotex.json` 即可。
 
 ## 界面无响应
 ## 编辑模式中光标不可见