Truncating posts – How to stop it!

I’m using the Stylish Blue Modern theme and I can’t for the life of me figure out how to modify the post code.

By default, the theme truncates posts so the visitor has to click on the post title before seeing the rest of it. I want the visitor to see the entire post when clicking on the link in the sidebar. I’ve searched the forum but this doesn’t seem like an “excerpting” problem. Can anyone help?

Here’s an example of the problem http://216.118.118.61/?cat=11

As a side note, can anyone tell me which php file is the one that is used for the posts? It doesn’t appear to be the post Posts Template (single.php)

Thanks for any help!