Title in post not visible

Toogle The Title did a great job removing the titles of my pages. However, it has also removed the title of my posts.
Deactivating the plugin does not solve the problem. How could I solve this problem?

You can see the problem following this link: http://calatravamoreno.com/blog/
The password is ‘password’.

I am using Toogle The Title 1.4 and WordPress 4.4.2.

Thanks in advance,
Mamen

https://wordpress.org/plugins/toggle-the-title/