Delete Empty Folders
Check this option if you want to automatically delete empty folders when deleting a file from results.
if you have the folder c:\tmp and the only file there is "Test.xls" and you compare c:\tmp and file "Test.xlsc:\tmp is empty, will be removed too.
NOTE: if you enable Delete Empty Folders, you may specify a list of files (with wildcards) separated by semicolon ( ; ).
See also: Ignored files when checking if a folder is empty.