I've uninstalled this, because i think it's a waste of space. You can do 99% of the tests yourself without the aid of an app. Also, on the N8, if you do a memory test, it just sits on the screen showing the stats with no back button, you have to manually exit. When you try again, it says the test wasn't completed. How long does it take?
I think you should give up trying to improve this and spend your time on something more constructive.