Nuance 1.0.10 is now available from http://nexi.com/nuance and fixes the crashing problem when hitting Reset on Windows 7 clients. I think this is the last known bug. Please let me know if there are any other bugs.
Chris: All of the alterations happen simultaneously. So if you change blue->green and change green->yellow, only original greens will be yellow. Of course there will be some bluish-greens that are yellowish because Nuance must blend the effects so there is no hard line between them.
About the feature request: Double-clicking on the slider labels should reset them to zero. Or is there another place you'd like to double-click?