He explained that his decision to leave was based on a reduction in the team's budget for the upcoming season.
In a statement, Dicks said that the lower budget, combined with other issues and the behavior of certain individuals at the club, made it impossible for him to continue as manager.
He expressed his concern that the players and fans deserved better support and wished the team well for the remainder of the season.
Heybridge Swifts confirmed Dicks' resignation and thanked him for his time and effort as manager.
The club has appointed Adrian Whitbread, a former West Ham defender, to take charge of the team on an interim basis while they explore their options for a new permanent manager.