Auto-loads subtitles from location Subs/[number]_[language].srt(Movies) or Subs/Name.of.the.video/[number]_[language].srt(Series) on video playback.
[language] is first language used from kodi settings(Player > Subtitles > Preferred Subtitle Language).
Subs subtitle folder structure is mostly used in torrent releases(eg. RARBG).
Download latest release from releases, then Use kodi guide to install the addon zip file. Subs autoloader should work right after installation.