Hi Daz
You can download the tuning software from the Autosports lab website
Here's a link
Megajolt tuning software
This site also has a forum, you'll find it in the Community tab on their homepage
Edit
Just to add & in case you didn't know !!
If your laptop or pc doesn't have a serial port ( Many new ones don't ) You'll need a USB to serial adapter cable in order to comunicate with the Megajolt