Cubase 11.0.10 Update delete my cubase 11 folder

i just downloaded via the Steinberg Download Assistant the new update release - cubase 11.0.10.
i install it, And for a very strange reason it deleted my Cubase 11 permanently!!
The folder where cubase was installed just disappeared.
This is something that has never happened to me, and I have been using and updating Cubase for many years.
Can you please help me?

Hi and welcome,

Are you on Mac or Windows, please?