Every time an update will be available, you will be notified from ThemeForest via email. Just follow the instructions in the email to retrieve an updated version of the file thedock.zip
Once you have the zip file follow these steps:
- Go to Appearance > Themes in your WordPress dashboard
- Activate temporarily another theme ( since you can override an active theme )
- Delete the TheDock theme ( not the TheDock Child )
- Locate the new thedock.zip file and click 'Install Now'
- Once the theme is installed, you need to reactivate either TheDock Child theme or TheDock if you have never exported.
- Reactivate 'TheDock – Builder' plugin if still needed.