On exit

JkDefragGUI - Options - On exit

Delete logfile on exit - When selected the latest logfile is deleted when the GUI is closed.
Save settings on exit - When the GUI is closed and this option is selected all settings and options will be saved to the configuration file except the "Shutdown after defrag" option.
Action after defrag - This will allow you to select which shutdown type is used after JkDefrag is closed, even when it's closed manually. The shutdown type can be saved but the shutdown option cannot.