ch341a - What is it? Specifications, diagram, price and reviews - Botland
Do not use random executables from unknown forums. Look for the official NeoProgrammer v21019 archive (typically on GitHub or reputable tech forums like Badcaps or Win-Raid). The archive should contain:
Allows you to view and modify binary data directly before writing it to the chip—useful for adding MAC addresses or serial numbers to router firmware. Hardware Setup for Success