DLL Cleaner moves all the items it deletes to the Recycle Bin. You can restore them by right-clicking on the Recycle Bin icon and selecting Open or Explore from the pop-up menu. Then just select the item or items you want to restore and select Restore in the pop-up menu (right-click) or File menu.
Tip:
It's a good idea to empty the Recycle Bin before using DLL Cleaner. Then it's much easier to locate any items you may wish to restore.
See Details, Recovering and Restoring and Exceptions for more information.