解决方法官网已经提供了

我这里摘抄一下，以便记录

LivePreview is not working - it displays an error message stating This view has crashed!
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).

英语不好，只能理解一个大概
当MarkdownPro实时预览失效，提示This view has crashed!错误。要解决问题官网给了2个步骤分别为：

• 要解决这个问题，请尝试安装Awesomium 1.6.6 SDK。
• 如果您仍然遇到问题，请安装Microsoft的DirectX最终用户运行时（2010年6月）。