The one I linked to earlyer (Here it is again,
**Clicky**)
is the newest version (v7.0.2) of the one here in SubSims (v6.2.0). You can also make your own code books.
Also, for TheDarkWaith, here's a link to the source code,
**Clicky**
It's written in Visual Basic.
But if you'd like to look at the Enigma Sim author's source code, he just asks you to email him, and give credit where do. (All info is found in the FAQ section.)