Because you can have an unlimited amount of grid layouts per grid as a user, you will need to choose which layout you want to view at any given time.
To load a saved layout, click the red button on the lower right side of the grid you want to load a layout for and then drop down the list box and choose the name of the grid layout previously saved. Once the drop down list box has the correct value, click the Open Folder button on the drop down list box (the button closes to the drop down button) to load it.
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Note: you can also load a layout by choosing it from the drop down and pressing the ENTER key on your keyboard.