Help with upgrading Cubse Elements 5 to 7 (or 8)?

I`m trying to upgrade my Cubase Elements 5 to 7.5 or 8. Which one should I check out?

Also, I’m using a Yosemite OS. Is the Pro 8 version compatible with Yosemite?

AND, I cannot find my license number for my Elements 5 version. I’ve checked my profile on Steinberg but I cannot find it.
What to do?

Thanks!!

Elements only exists up to version 7 at the time. 7.5 and/or 8 have not been released in the Elements style.

Open your eLCC and it should be there. If you don’t have eLCC installed due to a new computer or hard drive replacement or format, then you will have to follow the reactivation procedure.
HTH
J.L.