An easy fix would be to download the new updated version from Daz. Just login to your account at Daz (or set one up) and you get free updates for a month. There is a problem with the 3Delight renderer as used in Studio regarding bump and displacement mapping (as in, they don't work properly) so they've disabled that for the next build and are looking at other issues for the moment while the 3Delight problems are being addressed - you can still render though. Setting system time back is a solution but not an advisable one for a variety of reasons.