根据报错提示点它会自动打开官网让你下载某个插件。
进来之后它会自动锁定这个位置。
This issue has been specifically observed in Windows 8. You may see an error message as shown here, and no HTML will be rendered when you type in the Markdown Editor pane.
To fix this issue, please try installing the Awesomium 1.6.6 SDK.
If you continue to experience issues, please install [Microsoft’s DirectX End-User Runtimes (June 2010)]
对!就这个1.6.6 SDK 狠狠的点他!
然后安装就行了。