Install cubase 8 instead of 8.5?

I just upgraded to 8.5 from 7.5. In my world that makes me eligible to also install any previous versions right? However the 8.0 installer is not available online or from my steinberg. I would like to compare the performance of the two .

No go?

http://www.steinberg.net/index.php?id=downloads_cubase_pro_8&L=1

Would this work?

No.

No because i need the main installer from my downloads and it’s not there.

Usually you can always install older versions than the one you’ve bought but not this time for some reason

I see, indeed gone… I was able to grab a trial previously, but that’s gone too…