Customizing Appointments Plus plugin

My developer used the Appointments Plus plugin on a dev site to implement a system for booking tours. However, the time intervals this company has won't work with the regular plugin. I need to set up 6 tours, each of them 45 minutes long, every day from 9:30-12:30 (4 tours) then break then 2:30-4:00pm (2 tours). We haven't been able to configure this with the plugin as if we input 45 minute intervals the times don't work out and we couldn't set up breaks to properly implement this.