Do you mean the Codex in general, or the Console function? The Console has been deprecated, as the Cheat Menu has taken it's function.
You can get to the new cheat menu by clicking on the top of the “i” in TiTS several times in a row after loading a save, then opening options and selecting the new Cheat submenu.
Yes I want to open the cheat menu, but I do not know if I am doing it correctly. I go to data and load my save file, then it pops up with a load complete and from there I'm a little confused.