I need help to install/activate it.
Welcome to the forum.
You need to give more details what you have done already to do the upgrade.
The way to do it is, you received a Download Access Code when you bought the upgrade. Now start the Download Assistant, click on the top left right on the button and enter the code.
That is all, you do not need to reinstall the software, just start the Activation Manager and activate your Elements license.
I know it can be confusing, but the Activation Manager is not the same thing as the Download Manager shown in your screenshot. Could it be that you’re confusing them? How does things look there? (If that doesn’t help, you probably need to wait for a reply from a Steinberg employee, but they watch this forum so it shouldn’t take long.)
Have you tried running the Steinberg Activation Manager?
(Should be somewhere in Program Files, I suppose, I’m on a Mac so can’t tell you exact path)
You are requested to login, be sure to use the same emailaddress you used for the purchase
[edit: was on the phone while typing, @Rikard told you already the same
)
Thank you very much for the explanation. It is now activated and running. Thanks again.

