As far as I can tell, with the Braintree update, you don't need to make any changes to your custom plugin layout. The new VSTs are updates to ones that already exist, so they should already be in your custom layout from before. The new ProChannel module, as well as the new Anderton goodies, should get added automatically.
The only manual thing you need to do is Import the new Impulse Responses into REmatrix Solo.
Someone please correct me if I'm mistaken.