Downgrade Cubase 9.5 to Cubase 9.0

I upgraded to Cubase 9.5 from cubase 9.03. How can I get back my eLicenser code for Cubase 9?

windows10 pro i7 32Gb RAM

You can’t (as far as I’m aware).

But you can run any earlier (or lower) version of Cubase using the 9.5 license.

I would like that too. And my money back of course.