Yes the PW shaders need to be reset as this version of studio uses a new version of the 3Delight renderer and the shaders needed to be recompiled. I had no problem just running the installer without uninstalling. By the way anyone who says Studio doesnt have an advanced materials room might want to take a look at what QuillofVulcan has developed. http://forum.daz3d.com/viewtopic.php?t=61508