My CAD used to work fine, then one day this error popped up:
Unable to load customization file ... That customization Group already exists

(click on link to see image)

Then I click ok and this pops up

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!