The plugin itself is pretty straightforward. Once installed, it creates a new entry under the Edit menu as well as a contextual popup.
Operating on it is merely a matter of selecting the string (defaults to current line if no text is selected) and choosing the operation.
Important: The default key binding for the popup is Shift+Alt+M which doesn’t work well with MacOS, but it can be mapped to some other keyboard binding, such as Ctrl+Alt+M, easily via Preferences | Keymaps . Using the context menu is key to efficiency with this plugin so it’s highly recommended to make this change.