Wordpress Theme: unchangeable text???

Dear users,
I'm new on Altervista Wordpress-based blog. I choosed a theme for my blog (name of the WP theme is "eNews"), I would write something else instead of the default text: "NewsBlog - This is the news". But it seems there's no way to change that text/element. This would mean I can't use that theme... I need to replace it I tried all menus and tools but no one helps. What a frustration...

[karl94]

That's the logo image, you can change it from the settings page of the theme.

That's the logo image, you can change it from the settings page of the theme.

Thank you! Now it's all right! The problem is that this WordPress-based system is fantastic but menus and options are still a labyrinth :/