I found a error on configurator 3.10.1, when a select more then 1 button to change same of visual properties the popup error appears see picture attachedand i have to save the file and reopen if i want continue working
First I got to the Border property for one object and then I selected multiple objects using the mouse (rubberband Julian calls it). I then changed the border setting to EG. rectangle and then \'boom\' exception.