Mesh grabber morph editor add on

I have been having fun with the new add on morph editor, very simple for making and saving new morphs and then saving the scene to use the morph again.....But I just want to check something.
Am i correct in believing that when you save your custom morph you made using mesh grabber morph editor, when you close your scene and start with new scene and new character, you will never find your custom saved morph in the parameters tab because it only exists inside the scene or subscene that you previously made / saved. I found that all my edited morphs are being saved as part of the scene file and not part of the actual morph library. I certainly don't expect it to be there because it wasn't saved as a support asset....
To find and use that morph again, I need to load that previously saved scene where made the custom morph and that's when I can find it in the parameter tab again........Is this how its supposed to work?....Hope that makes sense.