Additives Tab
The Additives tab allows you to specify your own files/directories/registry entries to clean. 

The New button will bring up the following dialog
From this dialog you are able to add files, add directories and add registry entries that you would like to remove during the normal cleaning process. 

NOTE:  In order to simplify registry key entries when you click on the Add Registry button, the program regedit.exe is executed.  Once displayed you can browse to the registry key that you want to clean and then select the menu option
When you select Copy Key Name regedit.exe will exit and the key that you have selected will automatically be placed into the Registry entry list box.
Additives Tab