UR44C General questions

Hi guys,

I’ve bought one UR44C device to use it in a different way than you are doing.
I want to use it for motor vibrations measurements (using Piezo elements and accelerometers as vibration sensors).
I program audio data acquistion via USB connection (the sensors generate the data, the UC44C amplifies it and transfers it to the PC via USB).
The problem is, I cannot access each individual Input of the UR44C from Windows.
I only get the “Line In (Steinberg)” input which basically allows access only to MIC/HI-Z 1 & 2 (using audio acquisition as Stereo input), but I see no way of accessing e.g. MIC/LINE 3 & 4 or other inputs.

How can I do that? Is there a setting somewhere?
I was expecting to be able to see and access each Line In from the device such as “Input 1”, “Input 2” etc.

Can anyone help me with this?

Thank you in advance!

Best regards,
Paul