There is solution;
After line 71 add code:
delete_post_meta($nav_menu_item->ID, 'cpcm-item-exclude');
After line 217 add code:
$query_arr['exclude'] = get_post_meta($menu_item->db_id, "cpcm-item-exclude", true); // default value of 0 skips no posts
After line 358 add code:
update_post_meta( $menu_item_db_id, 'cpcm-item-exclude', (int) ($this->__empty( $_POST['menu-item-cpcm-item-exclude'][$menu_item_db_id]) ? "-1" : $_POST['menu-item-cpcm-item-exclude'][$menu_item_db_id]) );
After line 522 add code:
<p class="field-cpcm-item-exclude description description-thin">
<label for="edit-menu-item-cpcm-item-exclude-<?php echo $item_id; ?>">
<?php _e( 'Exclude Posts' ); ?><br />
<input type="text" id="edit-menu-item-cpcm-item-exclude-<?php echo $item_id; ?>" class="widefat code edit-menu-item-cpcm-item-exclude" name="menu-item-cpcm-item-exclude[<?php echo $item_id; ?>]" value="<?php $item_exclude = get_post_meta($item_id, "cpcm-item-exclude", true); echo $item_exclude != '' ? $item_exclude : '0'; ?>" />
</label>
</p>