!!Warning uploading the wrong firmware will damage the machine. Please pay close attention that you select the Bolt_firmware for the Bolt and Boltpro_firmware for the Bolt Pro!!
There are two ways of manually uploading firmware to the machines. (Please note that there is a difference between firmware and software)
upload the correct firmware to a flashdrive (USB-stick)
Boot the 3D printer
insert the flashdrive
On the touchscreen go to settings -> update
upload the firmware to the 3D printer to update the firmware.
If method one does not work you can upload the firmware directly to the LMC also known as motherboard.
Make sure the machine is turned off
unscrew the backplate of the 3D printer
connect LMC to your windows computer with a USB cable
Run the Xloader program on your windows machine.
select the correct firmware file. The extention of this file is .Hex
Select device Mega(ATMEGA2560)
Select the highest COM port
Boud rate 1155200
Click on Upload
Wait for the upload to be finished.