private void makeLocalDB() {
   if (!ysDir.isEmpty()) {
     localDB = new ArrayList<String>();
     File aircraftDir = new File(ysDir + "/aircraft");
     String list[] = aircraftDir.list();
     for (String lst : list) {
       if (lst.lastIndexOf(".") != -1)
         if (lst.substring(lst.lastIndexOf(".")).equalsIgnoreCase(".lst"))
           readLST(ysDir + "/aircraft/" + lst);
     }
     ys.localAddons = localDB;
   }
 }