License doesn't work after downgrading from Windows 10 to Windows 8.1

[KaleidonKep99]

Hello.

I used to use Aero Glass 8.1+ on Windows 10, because I really liked the blur from Aero.
I decided recently to downgrade back to 8.1, since I had some issues with some apps, so I took my DVD and reinstalled it.
Now, Aero Glass gave me a different machine code from the one registered on Aero Glass 8.1, so I can't activate it.
I thought it was tied to the HDD and the CPU, not to the OS. How can I fix this?

If Big Muscle wants the registered e-mail, I'll send it to him through a PM.

Edited August 20, 2016 by KaleidonKep99

[KaleidonKep99]

Aaaaaaand no answer...