How do I change from CJS to XDK and keep my webstorage data

I've changed my app from CocoonJS to XDK for online reasons. My app has a paid and a lite versions and now I have changed to XDk the webstorage data is lost. Does anyone know how this data is stored and how I can keep it. My app had unlockable extras and a profile EXP score which was all saved by the webstorage plugin.

Thanks