Dropbox updated their API.
Library should support it.
Currently example application just doesn't work because of the error: "You're using an older version of the Dropbox API with a new API key. Please use the latest version."
Thanks for the issue. I realize this is a must-have, but will be short on time for the next week or so. I'll try to get to it over the Christmas holiday.
Closing this issue, as this library has long been deprecated.