Manually changing the firmware in Cura
Cura is very very versatile, it lets you upload a custom firmware to your printer without the need of an IDE (like Arduino) and no compiling at all. The only thing you need is the .hex file of the firmware version you want to upload.
You can get the diferent versions of the firmware in the releases page. Under the release notes you will find the .zip files for the Firmware itself (Source Code.zip). and the .zip file for the LCD Display (SD.files.vXXX.zip).
Just download the .zip file and unzip ip. Under the Compiled Firmware folder you'll find the .hex file we're loking for.
Go to Cura > Machine > Install Custom Firmware
Navigate to the unzipped folder of the firmware > Compiled Firmware > Select the .hex file
The Software will start uploading the firmware and a progress bar should appear. When finish, the printer will reboot and your firmware will be uploaded.
##IMPORTANT!
Be aware if the firmware version you atempt to upload needs new files for the LCD display. Notice if in the releases page there's a SD.files.vXXX.zip
How to change LCD SD files: click here
Not changing the LCD Display may lead to errors and malfunctions.