I downloaded the basic version of netfabb,4.5. The program look nice and clean, and i was verry happy with it untill i realised i can't undo my steps in the repair proces. But i cant undo, let's say i'm in rapair mode, and delate a triangle. If i then undo, it undos the rapair mode, and my part is gone. Can't redo ither. Runing the program under vista 32 bit.