Dispite not being able to make QGC and Pixhawk 4 talk to each other, I thought about giving it another go and see what happens. I connected the Pixhawk to my PC (Windows 7) and noticed a differently named port:
So windows clearly had some idea what it was connecting to. I turned QGC on and then this happened:
Now the port in my device manager is gone and got replaced by "STMicroelectronics Virtual COM Port (COM4)
What is this error, what does it mean?
UPDATE: QGC notified me of an update release so I downloaded that and installed it. Now it looks like it finally recognised my Pixhawk