William the old version is indeed more stabile but has not inside the special 3d color routine,s As you not use the JT (Jo Trotsky) par files then it works also good as the earlier version Not all the JT parameters gives problems but a lot does not work correct and gives a crass Some people close the program then and make a re start but i have found a simple manner to go more quickly further Hint for as you have a crass click twice with the mouse on the Red render button so that it is not more active (grey) and click on the undo arrow and you can go further Sorry for my terrible English but i hope that you have some help with this tip Cheers Arend