If I need to turn the KML route layer on or off, I click the star at the bottom of the screen and that takes me to my bookmarks. Press and hold the KML file for one second, until I can choose which app to launch it from. Open URL of map service in the Maps app via Share menu Open text or page title as search in the Maps app via Share menu Open KML/KMZ file as collection in the Maps app. KMZ Viewer-Converter is an application provides you to load the kmz files, convert kmz files over the map. If you want to use in a video you may need to use for Google Earth Pro, I think that has the option to render routes into movie files. It's basically formatted text describing some location data. Kmz is a zipped 'keyhole markup file' as far as I know. From the drop-down menu select 'Choose default program', then click 'Browse' and find the desired program. The first and the easiest one is to right-click on the selected KMZ file.

If you want to associate a file with a new program (e.g.