Alternatively if you facing issues. You can open System Preferences on you Mac, go to Users & Groups, select the user you wish to enable the automatically launch on and switch to the login items tab. Towards the bottom of the screen there is a “+” symbol. Click on the plus symbol and add Shepherd to your log in items.
To edit the current launched items tap on the “Edit” tab in the menu bar. You will see a list of application that Shepherd starts. To remove an application swipe your track pad from right to left over the specific application. You will see a delete button appear. Tap that and that application will be remove from the launch items. Easy.