Hello everyone,
I upgraded/updated Cubase from 4.0 to 9 versions. At MySteiberg account, at Download tab, I have got Cubase 9 (10.5 GB). My question is, do I have to install all previous versions before installing C9 or can I install C9 at once (I mean, does C9 contain components of all previous versions) ? (As I know, upgrades/updates ovewrite previous version’s files, the same happens with eLicencer dongle). Thx for any help.
Just install C9. The 10GB installer has everything.
thx for your valuable response 
You can run older versions with the updated key, it will not overwrite your old version.