Though I enabled the subtitles option in the smart mode, it doesn't download the subtitles. While not using the smart mode, the parsing window doesn't show the box "Download subtitles" for me to check. Either way, the subtitles downloading doesn't work, even though I already paid and bought the licence for 4K Downloader.
The video at issue is https://www.youtube.com/watch?v=vLxwxIfETgo.