Xcode 6 GM crashes when selecting the main storyboard or a xib

Question

I just downloaded the Xcode 6 GM and every time I select the main storyboard (and a specific xib) Xcode crashes.

The error to be sent to Apple contains the following

Answer 1

One solution to this is to open the xib in Xcode 5 and let it change a bunch of settings. Then open in Xcode 6.