EdgeTX and Bootloader Update
Download the latest EdgeTX firmware folder by clicking on -
"EdgeTX Firmware direct download" at https://edgetx.org/getedgetx/EdgeTX firmware for all transmitters will be included in the folder.
Copy the file for your transmitter to the FIRMWARE folder on the SD card - (eg. boxer-3673c51.bin for the Radiomaster Boxer)
First step is to update the Bootloader.
The bootloader firmware is included in the EdgeTX firmware file.
On the transmitter navigate to the SD card FIRMWARE folder via the SYSTEM Menu
Click and hold on the firmware file.
Choose Update Bootloader.
Second step is to update EdgeTX.
Turn the transmitter off.
Hold the rudder and aileron trim buttons inwards while pushing the power button briefly.
Choose Update Firmware and choose the relevant firmware file
RF Module Update (4in1 multi module)
Download the module firmware file from https://downloads.multi-module.org/
Use the "Select a module" drop down list to find and download the firmware for your transmitter.
Copy to the FIRMWARE folder as above. With small mono screen transmitters, like the Zorro, Boxer and Pocket, the filename must be shortened to less than 32 characters before it shows on the screen.
Turn the transmitter on normally.
Navigate to the FIRMWARE folder, then click and hold on the RF module firmware file.
Choose Flash Internal Module.