The four different logs provided are:
Application Log. Also known as the kslog, this is the most useful log for viewing the activities associated with opening and using templates and activity on the web admin console.
Legacy Task Service Log. Used to track task activities for the pre-v5 task engine.
Installation Log. Import log for data and def files from the application installation
Download All Logs (zip). All available logs plus archived version and an environmental log for the system. This is the most common log provided to support.