zZ_Huawei_Advanced_Tool_v2.7.2.9

hello i have buy dongle 4 monnths ago i download this update from support zZ_Huawei_Advanced_Tool_v2.7.2.9 dongle ask me update is this pro bcz i m working with zZ_Huawei_Advanced_Tool_v2.7.2.8 I am scared that if upgrade dongle i cant work with older version