Remove Plex.tv Account Completely

Plex is a client-server media player system and software suite comprising two main components.
The Plex Media Server either running on Windows, macOS, Linux, FreeBSD or a NAS which organizes audio (music) and visual (photos and videos) content from personal media libraries and streams it to their player counterparts.
The players can either be the Plex Apps available for mobile devices, smart TVs, and streaming boxes, or the web UI of the Plex Media Server called Plex Web App, or the old Plex player called Plex Home Theater.

How to Remove Plex.tv  Account Completely

Under 'Danger Zone', click 'Delete your account'.