How to Uninstall Postbox

To Uninstall the Postbox Application:

macOS

1. Within Apple Mail, select Preferences > General. Select Apple Mail as your default mail reader.
2. Quit Postbox.
3. Drag the Postbox application from your Applications folder to your Trash.
4. If you wish to permanently remove all Postbox files and mail databases, delete the following folders: 
   ~/Library/Application Support/Postbox or PostboxApp (if you are using Postbox 6 or higher)
   ~/Library/Caches/Postbox or PostboxApp (if you are using Postbox 6 or higher)
   
   WARNING: THIS ACTION CANNOT BE UNDONE!
   
   (Note: In macOS the Library folder is hidden. To access it, open the Finder, hold the Option key, then select Library from the Go menu.)

Windows

1. Open the Windows Control Panel
2. Choose Uninstall a Program (Add or Remove Programs for Win XP)
3. Choose Postbox from the list and proceed with the uninstall wizard. If the Uninstall Wizard does not run, you can start it manually, by running C:\Program Files\Postbox\uninstall\helper.exe.
4. If you wish to permanently remove all Postbox files and mail databases, delete the following folders: 
   Users\username\AppData\Local\Postbox or PostboxApp (if you are using Postbox 6 or higher)
   Users\username\AppData\Roaming\Postbox (if you are using Postbox 6 or higher)
   
   WARNING: THIS ACTION CANNOT BE UNDONE!
   
   (Note: The AppData folder is folder is a hidden folder; to show hidden folders:
   * Windows Vista / 7 - Open a Windows Explorer window and choose "Organize → Folder and Search Options → Folder Options → View (tab) → Show hidden files and folders".
   * Windows 8 and higher: Open a Windows Explorer window and choose "View Tab → Options → View Tab → Show hidden files and folders, then click the Apply button".)