Just download from the Toaf website:
http://toaf.roverki.eu/index.php/en/download-en
Loads of information here, including a partial guide in the first line:
https://forums.mg-rover.org/mg-zt-ro...38/index4.html
I found it relatively easy to use but explore the programme in read mode only, don't use the write mode until you are sure of what you're doing, and back-up any modules before making changes.
Good luck