The "Known lists" window was needed for editing of some auxiliary lists. You can use these lists when you opened "Bind to SVN" dialog, it is "Roots" and "Modules" lists. These lists help you to simplify your work with your repositories. Now you can tune these lists as you wish by using this dialog.
Select list type Combox box which allows to select list for editing.
Known Roots It is list of Roots which you open by plug-in.
Known Modules It is list of Modules which you open by plug-in.
List
UP arrow and DOWN arrow These buttons move select on elements of the list
Replase The text from edit field will be written in selected place in the list. The selected text in the list will be lost.
Add The text from edit field will be added in in the list as new line.