How do you hide the Duplicate button in Redwood Purchase Order page

We have started to test and evaluate Redwood Purchase Orders and have come across the following.
On the Redwood Purchase Orders Page you have have the ability to duplicate a PO..

There is a button above po list.

We do not allow PO duplication.

Can this be hidden with VB or is there another way we have follow to hide it.

It becomes active when you select a PO.

thank you ,

Neil