I bought all my Steinberg licences (Cubase, Dorico and Ionica) on the Steinberg store online. They take cards and PayPal - I used my American Express card to pay.
There are two ways to buy Cubase.
If you buy a downloadable version, you get an Activation Code that allows you to download a licence onto a USB eLicenser using eLicenser Control Center. This is likely to be the same process you used to obtain your licence for Cubase AI other than the licence must be downloaded to a USB eLicenser and will not work with a soft eLicenser on your computer.
A boxed version of Cubase Pro includes a licence and a USB eLicenser. I believe you get the licence code on a card and there is a process to follow to turn it into an Activation Code that downloads the permanent licence onto the USB eLicenser. I have never bought a boxed product.
The USB eLicenser can come from anywhere - it has to be a Steinberg eLicenser or a Vienna Key (which is a Vienna Symphonic Library branded eLicenser). iLoks and other USB dongles will not work with Steinberg products. To get your Cubase Pro licence you will need:
- a computer with a recent version of eLicenser Control Center installed - if you have installed Cubase Pro from the latest version of the full installed from Steinberg Download Manager, you already have this
- Internet access
- the Cubase AI licence you are upgrading on your computer
- the Activation Code for the upgrade
- a USB eLicenser plugged into the computer
Once you have those things, you enter the Activation Code and you should be guided through the process of replacing your Cubase AI licence with a Cubase Pro licence. I am not sure whether you need to put the Cubase AI licence on the USB eLicenser first, but if you do that is simply a matter of drag and drop in eLicenser Control Center.
Make sure you use the option in eLicenser Control Center to register the USB eLicenser against your My Steinberg account. Amongst other things, this entitles you to a ‘zero downtime’ replacement of any Steinberg licences on the eLicenser if it is broken, lost or stolen - you just need a replacement USB eLicenser (at your expense).