I was going through my WL cleaning things out and deleting categories (I'd previously heard deleting a category removed all the items inside from your WL) so I go to my unsorted and wow, there they all are.

Is there no way to select/unselect all since the change? These were hoard categories so there are literally hundreds of items in there I don't have the time to remove one by one.

Nope, just gotta go through it. Its a huge pain.