Play the DAT/MD/CDR recording you made. You should hear the measurement signal.
Go to Measurement->Start to start a the measurement.
The result of the measurement should look like a measurement performed using WinMLS only, except that it is impossible to measure the time delay using this method.
When you perform measurements later, remember to load the same setup or make sure you use the same settings:
The same type of excitation (all settings must be the same, except the number of averages)