The 30-year-old striker moved to Home Park last month and made seven appearances, although he failed to score .
Hayes' loan came to an end after Saturday's 1-0 win over Northampton, in which he came on as a late substitute.
He wrote on Twitter: "Wanna wish @Only1Argyle/players/fans and everyone else with the club all the best. Really enjoyed myself for the month. Good win to finish on."