Just because you can connect it to your PC to update it doesn't mean it has it has the capability to do something it wasnt designed for. Looking at the firmware update they pointed you toward it was probably for stability, enable new features, etc.

Think of it like updating the firmware on your esc. Some have the ability to log, some don't, but you can make them perform better/more stable/mroe efficient with newer firmware. Your charger is the same in this case. It can be updated but no logging functionality.