Oh, that's good if it's registered. That's a start at least.

Windows 7 is no longer supported by Microsoft. Please see here:
https://forums.spybot.info/showthrea...l=1#post483130
https://forums.spybot.info/showthrea...l=1#post484266
That's probably unrelated to these problems concerning Spybot, though.

I have a link on how to start Windows 7 in safe mode. Could you select just plain Safe Mode, then double click Spybot Start Center? Let me know if it does start up.
https://www.lifewire.com/how-to-star...e-mode-2624540

Also, please click on "Why Cant I See the “Enter a new License Key” Button?"" under Updates & Licenses on this page:
https://www.safer-networking.org/support/spybot-2-faq/
Do you recall seeing that when you first downloaded and attempted to update Spybot? I thought it perhaps might be related to being unable to open Spybot Start Center now.