I’m frustrated

I can't sign in and I need to activate my Nero 12 installation on my new PC

Why can't I sign in. When I try to sign in, my email and password is shown as incorrect, and when I try to send a reset email, it says I have no Nero account. I purchased Nero 12 last year, and I can't use it on my new PC (files transferred from old hard drive) because the download email to activate it is no longer working.
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