I'm fairly new here too, but I'll do my best to help you out. Exporting arcade romsets can be a bit tricky, but don't worry, there's a way to include clones as well. Instead of using the "Export/copy rom files from selected games to new folder" option, try using a different method like "Export/copy entire romset to a new folder." This should export all the roms, including the clones, and you'll have them as separate rom applications.