[DO NOT UPGRADE TO QTS 4.4.1.1117!] Disastrous QNAP firmware upgrade, Plex Web GUI no longer loads

Shows you the list

ps -ef | grep -i plex

Now kill the processes (left most column number)

kill -9  process_number1 process_number2  (can add them all here) 

(example: kill -9 34511 34513 334555 )

If kill -9 doesn’t clear it, kill -11 is even more forceful.