Shipment for Virtual Products - Hide Custom Field

[crane]

Hi everybody,
I´m new to VM2 and have some questions.

I use the Shipment for Virtual Products Extension and it works well.

But how can I hide its custom field at the Product Details Page?
In custom fields when the Cart Attribute value is set to "NO" then it is gone, but then the Download Link for the virtual product is not shown in the email.
When I set "Hidden" to "Yes" nothing changes.

Can anyone help me please?
Thanks in advance