Upgrading, free trial

I am stumped from the start. I installed the free plugin and decided to try the free trial. I put in my AMEX number and then... your website asked me to download and install the dashboard plugin. I downloaded it, but it isn't a zip file, so I don't know how to even install it on my wp site. Doesn't it need to be a zip?

I only have one website and it is photography, so I would appreciate some help, step by step on how to get this done.

Thanks!
Donna