Upgrade old GUI for 2015b

Is there an easy way to upgrade a GUI written under 2010b for 2015b? When I open the GUI with GUIDE, it still shows the old 2010b widgets. These mismatched widgets are still shown even when I run the GUI.

I have seen reference on related questions to updater tools, but I don't see anything in the documentation about these tools.

[Jack]

What can I do to clarify this question? It seems like it would be a common issue with a quick answer.