Hello,
To change font size for product titles on Home page use this code in custom.css:
.slide-item .product .product-name { font-size: 11px; }
To update Visual Composer download the plugin archive from this link https://www.8theme.com/download-plugins/ , extract it and overwrite js_composer folder in wp-content/plugins directory via FTP.
Thank you. Regards, Eva Kemp.
