Success Codes, still appear
 

When I turn off the display of "Success Codes" from the main GUI it does disappear. But if you try to resize the last column, you will see that you can expand the column and see the Success Code column reappear.

To resize the last visible column, drag from immediately over the column indicator (vertical bar, with the dark arrow pointing left). If you start too far right, it will show+size the last (hidden) column instead (with the dark arrow pointing right).

Yes, I had figured out how to make it work the right way. I just wanted to let you know that the column was not actually turned off it is just resized to width of 0.

That is by design. It provides an additional way to show hidden columns.