Expand search for external SRT's

Hi everyone!

I'm using BSPlayer to download subtitles and watch movies on my PC, and use Plex to stream the movies.
When downloading subs from BSPlayer, the subs are downloaded into a "Subs" subfolder.

I wanted to ask - can I expand the search for external subtitles to the subfolders of the video file directory?
If anyone knows a way to download subs from BS without creating the subfolder, that'll be great too.

Thanks!