Returning to Cubase with New Laptop - Installation Help?

I had Cubase Artist 6.5 on an old laptop. This was a boxed DVD version with Dongle Licenser.

I have recently bought a new laptop and want to install the same programme on the this so that I can use it with my upgraded hardware. In case it matters I don’t need anything from the old laptop and plan to do a Windows reset anyway to freshen it up for its new owner.

The new laptop has no optical drive. What I would like to know is whether it is possible for me to simply download Cubase with my old license or if I will have to attach an external optical drive and install from the original DVD? I have browsed the Steinberg site and the forums and can’t find this specific issue.

I am presuming I will have to attach a drive but any help would be appreciated!