The Growtheme gets almost weekly new updates, bug fixes, minor enhancement or even completely new features.
These updates get automatically pushed to your WordPress Install. Once an update is available you will see a red icon inside your wordpress admin dashboard.
Just select the updates you want to install and click on the
Update Plugins or
Update Themes Button.
You will have to update both the Growtheme and Growbox Plugin seperately.
Please install all updates immediately as they can contain important security updates.