This article explains how to replace the native search bar in the Avada theme by ThemeFusion.
FiboSearch plugin has built-in integration with the Avada theme. It means you can replace the default search bars by selecting a single checkbox.
If you have activated Avada theme or Avada child-theme, you should see the following screen in the plugin settings:
WooCommerce -> FiboSearch -> Starting (tab)
Select the option “Replace all Avada search bars with the FiboSearch” and the search bar should be replaced.