How to install addon on Xenforo?

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How to install addon on Xenforo - Template Modifications

If you are running XenForo 2.1 or newer, you may be able to install or upgrade an add-on by uploading the zip file directly into the control panel. This requires a compatible server configuration and a change to the src/config.php file.
To enable this feature, you must first add the following line to the src/config.php file:
PHP:
$config['enableAddOnArchiveInstaller'] = true;

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Once that change is made, go to the Add-ons section of the control...

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