Hey Shawn,
For security reasons, you shouldn't be modifying the INI file directly. Instead use MONyog's interface. Once MONyog has started, from the local machine where MONyog is running access MONyog's interface (you can open port 5555 temporarily to do this). Then navigate to 'Tools' –> 'Preferences' –> 'Change Port' to change the default port to whatever suits you.