Select File sheet lets you select a file or files to be localized or imported.
Use the directory combo box on the upper side of the dialog to select the directory where the file(s) is located.
The list view in the middle shows the files that Sisulizer can localize. Select those files that you want to localize or import.
If you want to show only certain kind of files use the file type combo box to select the file type. You can also type a wild card filter to show only one type of file.