Following Ian Culverhouse's exit earlier on Monday, United chairman David Newton has since confirmed that the club's record appearances holder has departed too.
Paul played for the Pilgrims between 1992 and 2004 and 2010 and 2011 – amassing 679 appearances in the process of twice being promoted.
He was an ever-present in the United's first two Football League seasons – and returned in September 2022 to assist Culverhouse in a new-look management team at the Jakemans Community Stadium.
'Bazza' completed the promotion hat-trick as the Pilgrims triumphed through the play-offs in May 2024 to return to the National League.
He departs with the club's thanks and best wishes for the future.