Hosting Tools
The top toolbar here shows buttons to run Tim's Master and Hconfig. The DOS button lets you shell to a dos prompt. The host button executes the host batch file.
Host Files
This lists several files including the host batch file, all *.log files in the game directory, as well as the *.ini files in the game directory. When you select a new host file, AT will open the file and show it in the editor. In the above example you see "game1.bat" is selected and the editor shows the AT-created host batch file
Add-Ins
This lists the add-ons you've configured and allows you to add them to the appropriate Host File (or execute the add-in if it has its own config program. By pressing 'Add' (or 'Run' if the selected addon has a config program) the text will be added. 'Notes' shows the notes you've typed, and 'Configure' brings up the add-on manager.