Under that - to the right of each Library - more dots will appear when you hover the mouse over those libraries. Click those dots to the right of a library and there is where you’ll find the Delete:
Regarding Invisible Media Syndrome:
If you have TV Shows in a TV Show Library that don’t adhere to the naming and structuring guide, it’s very likely they are invisible.
https://support.plex.tv/hc/en-us/categories/200028098-Media-Preparation
https://support.plex.tv/hc/en-us/articles/200220687-Naming-Series-Season-Based-TV-Shows <— these are not ‘suggestions’.
Example:
F:\MCEB-TV
…Death in Paradise
…Season 06
…Death in Paradise - S06E01 - Erupting in Murder.mp4
FileBot (link in my signature) can handle that for you automatically or manually in seconds.
What FileBot can’t do is remove possible embedded metadata in the Title Field of MP4/M4V files. Plex will read this info and prefer it over a perfect file name/structure (we don’t know what you’re using), but you can combat that situation by moving Local Media Assets to the bottom of every agent list you can find. All tabs in TV Show and Movies here:
https://support.plex.tv/hc/en-us/articles/200241558-Agents
Just drag LMA to the bottom of the list and drop it. If you do have embedded metadata this will cure the issue, if you don’t it won’t matter. LMA will do what it has to from the bottom.
Renaming/restructuring is best performed OUTSIDE the library and you’ll need to write a new bundle for the show so The Plex Dance® was invented:
The Plex Dance®:
- remove show/movie from library
- update library
- empty trash
- clean bundles
https://support.plex.tv/hc/en-us/articles/200392106-Library-Actions <— update library, empty trash, clean bundles - bring names and structures into compliance/ or the ultimate bundle reboot operation
- replace corrected show/movie into library
- update library
All Steps. In Order. No Shortcuts.
There are many areas where failure may sneak into the plan of attack…
Log Files are always a good idea:
https://support.plex.tv/hc/en-us/articles/200250417-Plex-Media-Server-Log-Files
Drag zip file to a message window and drop it.