If the USB port does not appear: push the screen down (BOOT) and hold, tap RESET on the back of the board,
then click Connect.
If Connect or Install fails: hold the screen
pressed in (BOOT), click Connect or
Install again, and release once flashing begins.
Do not hold the screen in while plugging in USB - it is the
BOOT button (GPIO 0) and can enter download mode
unintentionally.
Choose Full install for a first-time install, after
Erase flash, or when replacing factory firmware (flashes at
0x0; clears Wi‑Fi and saved settings).
Update app only flashes the application at
0x10000 and keeps settings when bootloader and partitions
already match.