Are you talking about the Service Desk product or the Helpdesk product? I have a suspicion that this might be the Helpdesk product and it would not be a very straight forward process so I would recommend that you raise a support case about this initially. Here is a link to where you can raise support cases:
We are using the Helpdesk product, we currently have 6.2 in production.
we have versions 6.3,6.4,6,6.5,6.6,6.7 and 7.2.
I have opened up a case with support.