I have same problem. It's more than a week since the first review and still no fix. that's not a good sign.
When accessing the settings page I get an error.
Specifically calling this page (I removed the variables attached):
A responsecode 500 is coming back:
An Internal Error Has Occurred
Error: An Internal Error Has Occurred.
This app doesn't work...you get an error message when you try and add it which is a pity because it was something I was looking for.