DefaultButton class not available from Fabric UI in this version

[CodingSinceThe80s]

Category

[ x ] Question
[ ] Bug
[ ] Enhancement

First off thanks for creating this sample! I come from the .NET world and have been experimenting with this sample as part of my "conversion". I've noticed that the included office-ui-fabric-react version does not support some components, for instance DefaultButton
import { DefaultButton } from 'office-ui-fabric-react/lib/Button';

I have tried doing npm update office-ui-fabric-react --save in the project and I am getting a whole load of compilation errors like this one when running gulp:
Error - typescript - node_modules\office-ui-fabric-react\lib\common\BaseComponent.d.ts(29,24): error TS1005: '=' expected.

As far as I can tell it's trying to compile the new office-ui-fabric-react library and not succeeding. Why would that be? Is there an incompatibility between webpack/react and the newest office-ui-fabric-react version? If so how could I work around this? I have only just begun to understand the connection between webpack and typescript and babel and whatnot so any conceptual help is welcome.