I go into the google earth pro set my 1st kml file to a large area at level 9 tiles.
I also converted this area at the level 9 and 11 in geoconvert, When I then saved this area as my grid in vogel69 gridfile
I go and save a level 11 tile in fset to download and convert at higher resolution. Here is my home state of Georgia in USA and areas I have converted I did the whole large area first the have been filling in as I go the level 11 areas of my more particular interest. works like a charm