A new feature of Visual Studio 2013 is the ability to sign in with a Microsoft Account and have your settings be persisted across all of your instances of Visual Studio, amo
There is a comment about this under this answer, but I think it's important to list it here. If you want to preserve your settings, export them first because they will be lost.
From MSDN forums - since I had to hunt around far too much to find the solution to this:
Worked for me.