The MAXPOWERTOOL002 is not capable of logging data, as this was not the intended application for the device. The device is intended to help customers configure Maxim's PMBUS products, then save device settings to an XML file. Unfortunately, we don't provide the source code for the MAXPOWERTOOL002 GUI, so logging data from the dongle will not be possible.
There are a few 3rd party companies that make PMBus dongles (e.g. National Instruments, TotalPhase) which may be useful for logging. I suggest you contact one of these manufacturers for product reccomendations.