To save your work:
If you have not saved this file before, a dialog box will appear asking for a location and a name. TreePad adds the extension .hjt to your file name.
The name of the first node will always be the same as the file name.
You can also set TreePad to save your changes automatically when you exit. To do this choose View from the Menu bar, then Options, then TreePad, then Save automatically on exit.
If you have any unsaved changes, TreePad will display "Changes are not saved" on the left of the status bar at the bottom of the screen.