Generally, its additional files, such as preference files and application support files, When installed, Outline 3.5.1 creates files in several locations.
Instead of installing it by dragging its icon to the Application folder, uninstalling Outline 3.5.1 may need you to do more than a simple drag-and-drop to the Trash. Outline 3.5.1 is a third party application that provides additional functionality to OS X system and enjoys a popularity among Mac users. Unlike the software developed for Windows system, most of the applications installed in Mac OS X generally can be removed with relative ease.
How to Uninstall Outline 3.5.1 Application/Software on Your Mac