[bkone]

For old C3 (Part D) you need COM port settings like:
Navigate to:
Control panel > System > Hardware > Device manager > Ports (COM & LPT). Right click on that COM port you have left enabled and select Properties.
Go to Port Settings tab and set these values:
Bits per second: 115200
Data bits: 8
Parity: None
Stop bits: 1
Flow Control: None
Then click on Advanced... button and make sure Use FIFO buffers are checked and COM Port Number is set to COM2.
Press OK and close Device manager.

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In the Taskbar icon is SDConnect C4 not C3 multiplexer, maybe it is the problem, but how to fix it?

My taskbar icon is with C3 Part D but when connect to a car change to SD4 icon.

I give THX and Rep so Help me please.