Activation of Business Manager Lite after HD change

As I didn't change PC but only the HD. That's why I "forgot" to desactivate my Business Manager Lite license (same for Studio) before. Problem is that when I want to edit more than 8 quotes, I get a message telling that I'm in demo mode. Unfortunately the Activation button doesn't work (nothing happens when I click on it).

I tried to perform an offline desactivation but this didn't work neither?

What can I do?

Many thanks in advance

Eliane Mau