Right-clicking the System Tray icon will display a small menu offering the following choices:
Backup to file
"Restore" will show the TreePad window (at its previous size).
"Minimize" will minimize/hide the TreePad program
"Maximize" will show the TreePad window maximized, irrespective of its previous size.
"Backup to file" will activate TreePad and open the "Backup to file" dialog.
"Save file" will activate TreePad and save the current file to disk
"Close program" will close the TreePad program