After you received the Email, proceed as follows:

1. Make sure you are logged in to your Machinimatrix account
2. Open the Email that you received
3. Click on any one of the links in the list

Now all your purchases are assigned to your account.

Note: If you already created an account and logged in on the Machinimatrix Website, then your product activation link beams you directly to the download section and you are done.