// ---
workingDirField.clear();
tocFileField = new FileChooserField();
tocFileField.setFilter(HTML_FILEFILTER);
tocFileField.clear();
loiFileField = new FileChooserField();
loiFileField.setFilter(HTML_FILEFILTER);
loiFileField.clear();
personalsFileField = new FileChooserField();
personalsFileField.setFilter(HTML_FILEFILTER);
personalsFileField.clear();
colophonFileField = new FileChooserField();
colophonFileField.setFilter(HTML_FILEFILTER);
colophonFileField.clear();
coverFileField = new FileChooserField();
coverFileField.setFilter(COVER_FILEFILTER);
coverFileField.clear();
workingDirField.setSelectionMode(JFileChooser.DIRECTORIES_ONLY);
if (Application.OS_IS_WINDOWS) {