You can rename any existing Message Folder or Subfolder in several ways.
From the Main Menu:
- Choose your desired Folder or Subfolder.
- Click the 'File' menu, then 'Folder' (marked below in red), and finally 'Rename' (marked in blue).
- Edit the name, and when you're done, simply click somewhere else on the screen, or hit 'Enter'.
From the Folder List:
- First select the Folder or Subfolder by right-clicking on it.
- Click 'Rename' (as marked below in red), and edit the name. When you're done, simply click somewhere else, or hit the 'Enter' key on your keyboard.