Just update directly. Installing a new version will automatically retain the data of the old version. If the LZ download is a cracked version, it cannot be updated directly. The software signature of the cracked version is different from the genuine one. You need to uninstall the cracked version before you can install the genuine version. However, this situation can be perfectly solved with Titanium Backup (ROOT permission is required). Use Titanium Backup to back up once before upgrading. After installing the new version, use Titanium Backup to restore data (do not restore the program). .