How to Uncheck a Series of Watched TV Shows

Newbie Dave here. I have different seasons of TV shows on an external hard drive. I use a Element ti4 Kodi box. An example of my file system on the HD is I have Season 1 of West World in it’s own folder (about 8 different files) I also have Season 1 of Vikings in it’s own folder (About 10 different files). I have watched all the episodes of West World and only 4 of the 8 episodes of Vikings. There is a check mark on the screen next to each show I have completely watched, an underscore next to shows I have partially watched and no mark at all on shows I have not started watching. Is there any way I can remove the check marks from the folder that has West World episodes in only, so I can start watching them again without affecting the checkmarks of the 4 episodes of Vikings I’ve seen? Hope I’m not confusing you with this!! Tks, David