Please do get in touch if you need support.
The best thing is to email me on kevin@kevinpower.wales. This gives me the chance to look at the issue before I get back to you.
You can also ring on at any reasonable time, including the early evening; someone is usually (though not always) available to help.
We've got a really good success rate for producing software that's completely crash free, so we're not expecting this to be a problem.
If you have any comments, please share them with me. These apps are intended to help pupils to do well. If we can make it better, then we will.