This plug in has no configurable options, it's a simple widget with one text field labeled "Title:"
When I enter my twitter username in the field, I get this:
"The Twitter feed is currently unavailable or the username does not exist."
Which is not true, because I have a second widget running with that username and it's pulling the feed just fine.
(The second widget is Twitter Widget Pro, which I'm trying to replace because it includes too much additional detail, and the options to turn off @ replies, sending app, etc revert to default when you save the widget)