Connect your device then select the "Flash" option and push connect.
If asked to put your device into download mode do as follows:
Cardputer: Hold the btn G0 (upper right corner) and press RST (upper left corner).
StickCs: Turn off, connect a jumper cable between GND and G0 (in the header pin), connect the USB Cable and remove the jumper cable.
T-Embed: Keep encoder center button pressed and press RST button (CC1101 this btn is on the board, beside ESP32-S3 chip).
T-Deck: Keep the trackpad button pressed and press RST (in the left side).
Others: Turn off, keep BOOT button pressed and plug the USB Cable (or press RST Button).