Конвертер пишет The database tables are UTF-8, collations are correct and there is nothing to convert. You can http://avtoforum71.ru/admin/upgradehttp://avtoforum71.ru/admin/upgrade
А обновление не проходит, так как инсталлер указывает что "Your community suite data or database configuration is saved in an encoding other than UTF-8. Before your site can be upgraded to the 4.0.0 Community Suite, we must convert the encoding to UTF-8."