Is there a way to exclude watched files from being viewed

Because the Plex TV app no longer works on my samsung TV I am testing Serviio as an alternative because with serviio the native handler on the TV shows a nice graphic interface. However I am struggling a bit trying to mirror some of the features I am used to. In particular Plex makes it very easy to mark individual files and complete folders as "watched" or "unwatched". By searching for programmes using the "unwatched" flag it makes it very easy to see which is the next episode in a series - without being able to do this it is very difficult sometimes to access the correct one quickly. Of course i t may be that serviio only displays unwatched files but if this is the case I need some manual way to mark a lot of files as "watched" right now. I want to avoid moving files to watched folders because this ends up in my back up routine backing up the file more than once.
I would be grateful for any advice about this issue but also if anyone could point me to a comprehensive guide on how to use serviio (particularly for delivery from PC to TV over network)
I would be grateful for any advice about this issue but also if anyone could point me to a comprehensive guide on how to use serviio (particularly for delivery from PC to TV over network)