I finally figured out how to edit existing posts in my blog using WLW 2011.  It’s actually simple but not obvious with the Microsoft style of menus and toolbars.
|First you have to click the primary app menu in WLW that looks like this: |
Then click on Open Recent Posts.  Don’t click a choice on the fly-out menu to the right, just click the menu option itself.
|Finally, the traditional File/Open dialog appears.  On the left side you will see your specific name.  Click your name and all your previous blog posts are listed.|
From there you pick one, edit as needed and just click Publish to save it back to your blog.
So far I like WLW 2011 – does a good job where other web-based editors don’t.