HI Larent,
What is the issue you are having?
The KML "superoverlay" exports a number of files, split into "tiles", over a range of resolutions. These files are all held in a folder that has the same name as your export. Above this folder is a single KML file, which references files in the sub-folder. For the overlay to work, the top-level file (this is the one you uploaded in your original post) and the sub-folder (with all of its files) are both required. You won't see anything if you open the top-level file and the sub-folder is not available.
All file references are relative to the top-level file, which means you can move the set of export files without issue.