GE should fly directly to the right coordinates when you open the kmz file. The green line is the flight path, which is enabled by default.
Here is a snapshot of what I see immediately after opening the kmz:
By default, the plane models are not displayed, since they can bog the display down, so it's a good idea to select a small time range using the "time slider" at the upper left of the map. This is what you should see after checking the EKFattitudes box, selecting a short time interval and zooming in:
The "Attitudes" folder is based on the ATT record (AHRS_VIEW roll/pitch/yaw), so it will be rotated 90 degrees when in Qstabilize mode. The EKFattitudes folder is calculating Euler angles from the XKQ1 quaternion.
I'm running Google Earth 18.104.22.16836 (64 bit) on Ubuntu 16.04