[Tim Wood]

We have a bug for this as <bug://bugs/38379> (Add some mechanism for resetting styles other than the reset button on developer preferences).

For now, the easiest thing to do is probably:

- quit OmniFocus
- open ~/Library/Preferences/com.omnigroup.OmniFocus.plist in Property List Editor
- delete nodes under the "Root" that have "Style" in their name ("ActionStyle", "GroupStyle" and such).