Cubase AI with YAMAHA MG10XU

When I buy MG10XU all working. But after re-install windows. Now can’t install Cubase. First I Buy USB eLecenser…But have the same problem!!!
In my Steinberg Account in Software I have nothing. When install Cubase 9.5 AI I see: “your activation code already use”
Help me please

Hi and welcome,

You have to reactivate your Cubase AI.

I cant do that, because I have’t registration soft on MySteinberg. I dont know where is that soft and how i can intall that.
I have CUBASE AI 9 from yamaha mixer

Hi,

If you did’t register Cubase AI with your original Soft-eLicenser (before you reinstall Windows) you have to contact your local- or official Steinberg support.

thanks