to download the free plugin you:

1) go in the top menu "plugin multiclicker2"
2) select free on the left
3) Select the plugin that you care
Once you have chosen you have to get the key here: [Only registered and activated users can see links. ]

Once the enter key generator:

1) name of the site
2) your account and click on the button that relates to your version of MC2 used

Bye