Lawumun Unfortunately LM doesn't have the ability to manually manipulate subtitles, and can only add subtitle files that exist at the time they're added to the site or as they become available in the future. You can check on sites like opensubtitles.org if there is a movie or show that doesn't have the subs you want, or if the active set isn't working properly, and you can download the relevant subtitle file(s) and upload it directly to the player as a custom subs set - just make sure it is in .srt format.