Install version 1.4.0.14 or later of the USBClient.
if this is not a new installation, but a upgrade.
Run the new version and kill it off again.
In the ini file there will be a new entry called :RECORDINGTYPE=0
Values for this feature
0=Normal mode
1=For a Analog line tap
2=For a Radio link tap
Save the ini file and start the USBClient.