tundramd
As far as I am aware no such software exists. Your best bet is to scour the net for examples of the types of questions your likely to come across in the testing.
Mental arithmetic, raw data, distance, speed and time can all be researched through the internet. As you have sat the test previously, you should have a fair idea as to what you will encounter. I'd also advise that you become comfortable with the very basic instruments in an aeroplane, as there are questions based around quick, accurate reading and interpretation of them.
Hope this helps!!
Blackbird