Hi Laurie,
I just installed it on my iTouch(2nd Gen). Once I logged in I was presented with a list of trees. 1 was my family tree and under it was "Sample Tree".
Next to each tree was an arrow that looked like this: >
I clicked on the > next to the words 'Sample Tree' and was given the option to "Remove Sample Tree" by clicking on a big red button. Hope this helps.