A: Yes, for all registered Cubase 5 owners. You cannot purchase it separately.
Go to: https://www.steinberg.net/en/support/downloads_legacy.html (Always double-check that you are on the official Steinberg domain). cubase 5.1 2 update download
Cubase older versions in support page are trial versions or full? A: Yes, for all registered Cubase 5 owners
If you encounter any issues during the update process, here are some common problems and solutions: cubase 5.1 2 update download
A: Yes, but with caution. Install them on different drives or use separate system partitions. The eLicenser and Steinberg Activation Manager conflict if both are open simultaneously.