Since the Windows Live Writer Backup Utility won't work under Vista x64 at the moment, I'd like to describe how you can do this manually.

The complete settings consist of four parts:

• Blog Templates
• Blog Posts (drafts and recently posted)
• Plugins
• Registry Settings

Blog Templates

The blog templates reside at C:\Users\<your user name>\appdata\Roaming\Windows Live Writer\blogtemplates or when using C# you should use Environment.SpecialFolder.ApplicationData followed by \Windows Live Writer\blogtemplates to get the path.

Blog Posts

Your blog posts are located in the "Documents" folder inside a sub folder called "My Weblog Posts". C# knows the "Documents" folder as Environment.SpecialFolder.Personal.

Plugins

If you installed any plugins for Windows Live Writer, you will find them inside your "Program Files" folder underneath "Windows Live\Writer\Plugins"

Registry Settings

Last not least, you have to open regedit.exe and navigate to HKEY_CURRENT_USER\Software\Microsoft\Windows Live\Writer. To backup, simply right click, click "export" and write the settings to a .reg file. Double click this file to import the settings again.