Pop in your sd card that came with your Q there should some videos from Yuneec on there to show how to do it. If not then you can find them on You tube. It's not complicated, but a tad bit to much to explain.
At HealthyDrones.com - Innovative flight data analysis that matters there are only DJI drones supported. So I think it will not work with Q500 flight log data.
But maybe I'm wrong. The files are on the micro SD card in the ST10 (under the battery of the ST10). Files are called /FlightLog/Telemetry/Telemetry_000**.csv. Those contains the telemetry data, sent by the bird to the ground station.
I have done a lot with it - it's very intresting what the ST10 records.