Are you looking in the Smart content tab or the Content library tab? Renderosity content will only appear in Smart content if it has metadata.

All content should appear in the content library tab as long as Daz Studio is correctly configured to your content location.

Have a look here if your content is not showing in the Content Library tab. http://docs.daz3d.com/doku.php/artzone/pub/software/dazcontentconfiguration