A: Yes. The KD-C1, KD-C1 Plus, and KD-C2 all use the same or similar WCH CH340 chipset. The same driver applies.
The most reliable source is WCH’s official website. Search for "WCH CH340 driver" or use the direct link structure (typically www.wch.cn > Download > CH341SER.EXE). wln kd-c1 usb driver