I have been having the same pla printing issues with the new hex nozzle. I want to revert back to my bush nozzle since I heard it prints PLA better. When I update the firmware on the taz, it ends up all glitchy on the lcd screen and it wont increase the temperature of my nozzle. Am I missing a step or something? Can someone help me revert back to use the bush nozzle?
I think you mean Buda hotend. I would just download it fresh from here http://devel.lulzbot.com/TAZ/Holly/software/2014Q3_rB/Marlin/Marlin-2014Q3_rB.tar because maybe the one you have got jacked up somehow.