[JoshDi]

My wife enjoys watching friends, but doesn't want to mark them as unwatched to see all episodes

There is a feature of Kodi for using multiple user profiles:

environment for multiple users [...] Separate media libraries for each user [...] All options stored in the userdata folder can be customized per profile

There have been some problems with this addon (4 years ago); it might not work if you use a mySQL database instead of the SQLite.

If every user profile had his own settings for the addon, one could use different databases for each profile

Thank you. Its not a matter of having different accounts - I dont really watch friends. I basically dont want friends to ever be marked as watched. I run the following query in the mean time to clear out the watched status: 

sql:
DELETE FROM `episode_watched` WHERE idShow=ANY(select idShow from tvshows where title = "Friends")