I've noticed that when I uninstall a program, it usually doesn't free up as much memory as it occupied when originally installed. This makes me think that the uninstall process is not as clean and complete as it should be.

Today, while adding a book to my FBReader library, I saw the following in my /home/user directory:

Edit: tried to post a screenshot with a Picasa link, but it didn't show up. Not sure what's wrong. I'll try to explain with words.

In the /home/user directory, I noticed hidden folders for programs I had uninstalled through the Application Manager months ago, including a .boswars folder. It looks to me as though these applications are leaving some trace of themselves behind.

My question is this: how can I access and delete those hidden files? So far FBReader is the only program I've been able to see them in.

Also, I'm new to Linux and have zero experience with Terminal, so if your solution involves using terminal, please talk to me like I'm 5.

Thank you.