MGShelf:
If There is no user shelf been embed into MGshelf,Then clicking it will popup MG_shelf Manager UI.U can embed your mel / Shelf into it.
If u have embed some mels already then clicking it will load MGshelfBar which holds the shelves that U have embed before.
Right click on the MGshelf icon:
Items above MGshelf manager: All embed user mel will be shown in menu item form in this section.
MGshelf manager..: Select it to load MGshelf manager to manager your embed user mels.
MGshelf Help..: Select to load MGshelf help.
Items above MGshelf manager: All embed user mel will be shown in menu item form in this section. MGshelf manager..: Select it to load MGshelf manager to manager your embed user mels. 
MGshelf Help..: Select to load MGshelf help.
