Show Categories in Files Windows
When checked, Tidy It Up ! shows the categories at the right in the files windows.  This is optional since it slows down editing of the rules because when you are modifying a rule, for example, Tidy It Up ! has to reclassify the whole file list to maintain the coherence between the categories definitions and the files window.

Hide Files with same Type/Creator
When this option is checked, Tidy It Up ! shows only one file of any given Type/Creator, this is useful because you may have many font files, for example, and it is also faster to reclassify.

Move Files ONLY in Dummy Files Folders
If this option is checked, Tidy It Up ! moves the files (in X,Y position) only in the folders listed in the "Dummy Files Folders" dialog and only shows the files included in the Folder list in the files window. If this option is not checked, Tidy It Up ! moves all the files recursively in the system folder.