You also have there a link with more information and dowload link.
Important changes in the material preview advanced controls respect to v2.1.0: * Added Dynamic Camera rotation and zoom! * Separated the light power control for the key light and the fill lights to control them separately. * Added Max.AA samples for material preview, to get a progressively refined preview. Quite interesting for rough glass or when using a World background. * Removed some controls as requested by Alvaro.
I hope you like this. I will try to release this new version as soon as I can.