Upgrading to a Commercial License

I have a free license for eM Client. I would like to UPGRADE to a full version where I can have more than two accounts. How do I do that and keep the content I currently have in the program?

Hello?? I would like to upgrade my eM account to a commercial license. ANYONe know how to do that? There is no link in the HELP section.

Follow this: http://www.emclient.com/upgrade-to-pro