Select Directory sheet lets you select the directory where the files will be localized.
Use the directory tree on right side to select the directory where the files are located.
The combo box below the directory tree shows the files that Sisulizer can localize. Select the file extension of that file type that you want to localize. You can also write your own filter (e.g. Data*.html).
Check this to localize also all matching files in sub directories of the selected directory.