It’s highly recommended to always have everything up to date. If it’s possible please go ahead and update your WordPress and all plugins and themes. Older versions of WordPress, plugins and themes are main targets of attackers, and leaving them like that is security risk for you.
Upgrading in most cases is quite easy. Just make sure to create backups of your files and database in case that upgrade does not finish correctly. AGCA has some recent security patches that are recommended to use, so we can not recommend anything else but the latest version. If you decide to to that, please upgrade everything.
