Cubase 9 Update

I am trying to install the latest update to Cubase 9 and it says I need 16 GB. WTF, I have the first version already installed which by the way crashes when I open existing projects. The update is 536 MB but it wants 16 GB to install.

Hi,

Cubase Pro 9.0.0 Full Installer asks for the 16GB. The 9.0.1 update is not so large.

What version do you install, and how?