Unable to Connect Wincher Plugin: ‘x_website_limit_reached’ Error

Hello, I have registered on Wincher and selected 5 keywords to try it with my site. I also installed your plugin on WordPress, again on the same site, to test it. After the installation of plugin I followed the instructions: “Before we can retrieve any data, you need to connect to your Wincher account.” So, I clicked on “Connect to Wincher.” A new window appeared where I selected google.es. After clicking on “continue,” I got the message “x_website_limit_reached,” and it doesn’t connect or give me access.