Lo siento, no hablo español, pero aquí está la respuesta en inglés.
There are two ways:
1. Go to Settings > Advanced >
Force URL.
Write the URL with
https://, so that the X3 app will always redirect to https version.
2. .htaccess
This is more complicated, but will redirect ALL requests to https directly from your server. Add the following to your root .htaccess file. This file is often "hidden" from your FTP editor, so you may need to adjust settings.
RewriteCond %{HTTPS} !=on
RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]
It should normally work. If not, there are a few other suggestions here:
https://www.askapache.com/htaccess/http ... write_Code