error: Unable to load customization file That customization Group already exists

Hello,

My CAD used to work fine, then one day this error popped up:
Unable to load customization file ... That customization Group already exists
http://screencast.com/t/yXCZ3wEMBq
(click on link to see image)

Then I click ok and this pops up
http://screencast.com/t/sD9AsECqURxH

and none of my menus or ribbons load (except autotable)


I've seen this help topic on other forums, and I've tried to follow it, but it doesn't match what I have seen.

Help instructions on how to fix this are greatly appreciated!

Thanks
-Ariel