We release updated versions of our themes from time to time, either because WordPress has updated its CMS, or because we’ve added new features or fixed a bug. If you want to upgrade your theme, you can do so by downloaded the .zip file again.
The .zip available from your account will always be the most up-to-date version of the theme.
If you’ve modified your theme since installing it on a website, you might only want to update certain files.
You can view a change record by following a link from the theme information page, or by checking the theme documentation (by clicking the “support” link at the top of the page). This will tell you which files we’ve updated, so you can upgrade your theme in the simplest, safest way possible.