tl;dr: You can get a utility to convert KML files created by FR24 to CSV format at https://github.com/harper493/kml2csv
After N72EX I wanted to do some analysis of detailed KML files from FR24. I was surprised to find that there is nothing out there to convert the rather arcane KML format to something that e.g. Excel can understand. So I wrote one myself.
To run it, and assuming you have Python 2.7 installed on your system, just do e.g.:
./kml2csv.py mykmlfile.kml
It will generate mykmlfile.csv. There are some other command line options, look at the code or do ./kml2csv.py —help .