The TSW editor does not import elevation of KML paths. Instead it just snaps them to the landscape. Do you have the SRTM tiles loaded? Also on a side note, you shouldn't be creating stuff in the main content folder. Instead make a new plugin and put your work there.
I advice you to go step by step through the tutorials explained in the following threads to import your DEM/DTM correctly into the Editor. You seem to mix up a process importing the .kml file and SRTM or Lidar data: https://forums.dovetailgames.com/threads/editor-documentation-collection.74478/ https://forums.dovetailgames.com/threads/lidar-tutorial.74374/ https://forums.dovetailgames.com/threads/unofficial-terrain-creation-guide-for-beginners.75275/ and this video: Plus mabye this for understanding: https://forums.dovetailgames.com/th...-of-google-earth-kml-files.76025/#post-751595
