Enumerate Items: This will add a number, counting upward, to the end of each file that is renamed.For example, if you select a directory that has files within sub-folders, those will not be affected. Exclude Subfolder Items: This excludes items in selected sub-folders from rename operations.Exclude Folders: If this is checked, the operation will only apply to files and not folders.Exclude Files: If this is checked, the operation will only apply to folders and not files.With this checked, all instances of the search term will be replaced. Match All Occurrences: Normally, only the first instance of the search term is replaced (from left to right).For example, the term “dog” would match different results than “Dog.” Case Sensitive: This option makes searches sensitive, whether the letters are capital or lowercase.Use Regular Expressions: This allows the use of powerful search strings known as regular expressions, which can enable very in-depth or complex search-and-replace operations.Consider each one and place a checkmark beside those that you want to use. Near the middle of the window, you’ll see other options that change how PowerRename works. That way, you don’t have to guess what the result might be. Here’s an example where “P4” in each file name has been replaced with “photo_.” The neat thing is that PowerRename provides a preview of what the renamed files will look like right there in the window.

Sourceforge and batch file rename