QTFW Installer 2.0.1 - Add key to windows registry

[papercut87]

Hi all, i'm using the QT Framework Installer 2.0.1.

My problem is that i'm not able to ADD, REMOVE a key from Windows Register.

I already tried all different solution

using installer.performOperation("Execute", "cmd /C reg ADD...
using component.addElevatedOperation("Execute", ...
and combination of each other

but nothing seems to write in the register. How can i achieve that?

Thanks in advance.