Hi Moss! 
I tried to create a global struct in C++ like your example, but the compiler can’t complete:
Error C3646 ‘FName’: unknown override specifier
I created the same header file that you and include to main header. Also I tried to close UnrealEd and delete all folders except “Content” and “Source” and tries to compile again, but the same problem :S
I upload a image to show the distribution of files in the solution. I think they are good.
Can you help me please? Thanks!
TerrorJam.h
#pragma once
#include "Engine.h"
#include "GlobalStructs.h"