[SOLVED] Open with.... Media Center

Media Center threw up an error saying it had stopped unexpectedly.
Since then if I right click on a video or audio file and select "Open with" or "Choose default" Windows Media Center is no longer an option.
I can still play files from my library through Media Center it just won't let me associate files with it.
Any ideas on how to get the functionality back?

Try to run the Media Center Setup:

1) Open Media Center, navigate to Tasks
2) Select General and Windows Media Center Setup
3) Select Run Setup Again and choose the Default option

If that still does not work:

1) Open Control Panel
2) Select Default Programs
3) Choose Set Your Default Programs
4) Select Windows Media Center from the list and Click the Set this program as default (do this even if it already says it has all it's defaults)

Thank you so much draceena - re-running Media Center setup fixed it.