private static void removeSecEmptyDirs() {
            final File[] files = LocalStorage.getLegacyExternalCgeoDirectory().listFiles();
            if (ArrayUtils.isNotEmpty(files)) {
                for (final File file : files) {
                    if (file.isDirectory()) {
                        // This will silently fail if the directory is not empty.
                        FileUtils.deleteIgnoringFailure(file);
                    }
                }
            }
        }
Method to remove static map files with double underscore due to issue#1670
introduced with release on 2012-05-24.
main/src/main/java/cgeo/geocaching/storage/DataStore.java