Thank you GeminiLabs for this prompt answer.
1. Posts in the sidebar are not really an option for me because I use the Hello theme and it has no sidebars. Anyway, this is not the idea.
2. Yes, I saw this explanation in the help section of the plugin. However, I didn’t know where I should use this code. Can you please clarify this? Should I insert the code to the plugin or to the theme?
I am not afraid to try. I did backup my site.