1) I activated the plugin and changed the wp-admin but on the frontend I no longer have a fully protected connection. How can I make it secure? In my hosting I have successfully installed the SSL certificate.
2) Going to CMS detector you can see that I have installed WordPress and the version of it, how can I make this information completely hidden?
1) Are you sure it’s because of HMWP? Have you tried deactivating HMWP? I checked your site’s page source and could see that some images use http instead of https (https://www.screencast.com/t/8qqNtOPdQn)
2) I renamed the plugins names (Permalinks & urls tab), enabled auto configuration option and added some replacements under Replace Tools tab, but it seems like wordpress is still being detected.
Can you please provide us with your site’s server access log so that we can check what exactly whatcms.org is accessing in your site. Thanks!