private String getUpdatedPath(final String oldPath) {
        final int lastSegmentStart = oldPath.lastIndexOf('/');
        return oldPath.substring(0, lastSegmentStart).replace("mapsV4", "mapsV5") + oldPath.substring(lastSegmentStart).toLowerCase(Locale.US);
    }
Return an updated path string, reflecting folder structure changes between
OAM v4 maps and OAM v5 maps
- last segment in path is now completely lower-case
- "mapsV4" part has changed to "mapsV5"

@param oldPath folder name (without trailing '/', and without filename)
main/src/main/java/cgeo/geocaching/downloader/MapDownloaderOpenAndroMaps.java