Memory usage

After analyzing a few of my HDD's and defragging, Defraggler will suddenly use up a massive amount of RAM by itself... Here's a screenshot to prove:

eq2gsi.jpg

When i first open Defraggler, it starts off at about 6 or 7MB RAM usage, but as i mentioned, after a few scans and defragging a few files, the memory usage takes a huge jump.

Here's Defraggler open (with RAM usage visible):

http://i36.tinypic.com/73pkiu.jpg

Defraggler closed:

http://i36.tinypic.com/2nsp9pd.jpg

Currently using Windows XP Home SP2.