I got JTAG debugging to work fine. I used Zadig to set Interface 0 to the recommended WinUSB (v6xxxxx) driver with no problem. After that JTAG debugging worked! My problem is somehow I clobbered the Interface 1 driver and my serial port doesn’t work now. Any suggestions on how I can reset my Interface 1 driver back to the serial port? It seems there is no simple way to set it back.
Thank you for any help!