Ok, anyone EXCEPT kingtobbe is welcome to offer suggestions as to solutions. It was his suggestion that caused this problem in the first place, and so I'm not listening to any more of his bullcrap.
In this thread ...
I moved the CK to my FO4 folder as he suggested. I noticed that most of the DLL files were identical, so I told them to copy and replace, thinking that the CK must use the same DLL files as before ... after all, wouldn't that make sense considering the whole part about the CK having to be in the same folder as the game?
Kingtobbe didn't give me any instructions beyond simply moving the files. I had no idea that these DLL files were technically different DESPITE having the same name!
Well, that didn't solve the problem. In fact, it made it worse! Now I can't even launch the GAME, let alone the CK!
Here's the message I get:
Even when I download the GFSDK_GodraysLib.x64.dll file off this link ...
... it still doesn't work!