Shipment for Virtual Products - Unable to crete new media for sale

[woodhouse]

Hi,
I installed the plugin Shipment for Virtual Products and I followed the installation documentation.
I created the custom required field and the safe path is configured.
Following the documentation I should go to the menu "Shop > Media Files" but that menu entry does not exists.
If I try to create a new media (menu Virtuemart->media) I can only upload image file.
Could someone drive me to the right menu entry or explain me how to create a salable file?

Thank you for your help.