Hi there and sorry for the delay.
The answer is all here:
http://mididesigner.com/qa/108/how-can-i-upload-a-normal-file-in-an-answer-on-this-q%26a-site
Unfortunately, you have to mail the layout to yourself to get access to it, preferably on a computer. We're aware that it's not an idea setup, and will be working to change this in the near future.
Thanks for your patience!