While trying to download the recorded track (3.5 hours recorded) I got an error at the end. I did not fully realize that there was a problem and deleted the track on the device.
Now the software is only showing the track as downloaded (with summary info) but no further information, such as track points, heartrate, etc.
I could identify a temporary file TempTrack.xml that I copied to back it up. But I cannot import this file type into the software.