Preston3

@rw3iss In my own experience I noticed that sometimes Cura will allow the skirt to be printed in material 1 before switching to material 2 to print the object. I suggest switching the model to layer view and checking to see what layers are actually being printed from extruder 1 and extruder 2. In my case I always stopped the printer when I saw the skirt/brim being printed in the non-desired material thus it took a few hours to realize what was happening. In Addition, it is possible to right click the Extruder 1 in the right side toolbar and disable it, same goes for extruder 2. Hope this helps! Current Release: Cura 3.3.1

Dr Dave, The only luck I have had was to delete the 3.2 & 3.3 folder. Opening Cura accepting all the popups then closing out and replacing the 3.2 file in the deleted location from the trashbin.