After clicking on "Scan", the log window will say "SCAN COMPLETED", but no module found will be listed even though it is connected.

Check the supply of the module and the CAN bus connection. If a non-supplied CAN cable is used, a 120 ohm terminator may be missing. Set the correct baud rate, that means if the flashed program has an other baud rate than 125 kbit/s of the bootloader, it must be scanned at the baud rate of the program. Also, check the boot loader ID, which by default is 1FFFFFFX as a 29 bit ID. If it still can not be found, check if the module reports with the Bootloader-ID when switching on.