Hi everyone!
Just bought Cubase Pro 9.5 box. Got write USB hard key in ELCC. But when I start to enter download access code at mysteinberg, I got “This Download Access Code does not exist. - 404”. Did I miss something?? Please help me, thanks. 
Hi and welcome,
If you bought Cubase Pro 9.5 box, you get an USB-eLicenser with the license preinstalled. So you should be able just to plug the USB-eLicenser in and start Cubase.