Note: You can upload either a standard ".FHL" file that you create in FSHost, or an FSNavigator flight plan file.
For FSNavigator files, create your plan in FSNavigator using airports (not runways) then
click Plan / Export and select the WindowsINI format to save it as a ".INI" file.
FSNavigator .INI files will be copied to the FSHost directory and renamed to a .FHL file with the same prefix.
For example, if you upload "hoplist_hawaii.ini", it will be copied to "hoplist_hawaii.fhl".
If a .FHL file already exists with that name, it will be overwritten.