The first one will be from Paypal confirming that the payment has been made.
The second one is from us, as shown below.
It contains the following:
1. the email address your licence is registered to
2. your personal registration code
3. a link "Download Hindenburg Journalist" that will take you directly to the download page on our site and prepare the correct download of Journalist or Journalist PRO for you. Just follow the instructions from there!
For more info, please see this article in our online guide.