mp3 plug in registration

Hi

I bought a zoom recorder and got a Cuebase LE6, but in order to export to mp3 I was requiered to purchase the plugin.

I bought it, downloaded it, and installed it, and then was asked to activate it. I couldn’t find the activation code, but now that I found it I don’t have the option to activate it. What sould I do in order to use it?

Thanks!

Amit