Check the connected eBrain, verify that it is on firmware 4.1 or newer, and then move into browser-based flashing without leaving the same visual system as the rest of the device tools.
Press Check Firmware Version to request get_info from the connected eBrain.
Connect Pin0 to GND before powering on the eBrain. That puts the board into BOOT mode so the browser flasher can take over cleanly.
After flashing, remove the jumper and reboot the board normally before returning to the workspace.
Ground GPIO0 before power-up to enter BOOT mode, and leave the power switch at 0 for USB flashing.