public static final void register(String extension, StdImageSet iconset, String description, String referenceURL, FileProxyCreator fileProxyCreator, boolean allowOpen) {
		extension = normalizeExtension(extension);
		for (FileType type : TYPES) {
			if (type.mExtension.equals(extension)) {
				TYPES.remove(type);
				break;
			}
		}
		TYPES.add(new FileType(extension, iconset, description, referenceURL, fileProxyCreator, allowOpen));
		ICONSET_MAP.put(extension, iconset);
	}