In my opinion, global reset button is a must-have feature in UFRaw. This idea appears in many discussions and comments to various UFRaw blog posts (e.g. http://iffles.com/2010/02/10/introduction-to-using-ufraw-to-edit-raw-files/\)
It's such an obvious feature so it's really surprising it hasn't been implemented yet.
Any chance to have the global reset button added in next realese?