Victure sometimes distributes updates through email to prevent users from installing the wrong version. Request the file directly via their support email.
If an update is available, follow these steps to download and install it: victure m3 firmware update
If the device freezes during or after an update, you can try a hard reset by holding the Reset button for about 3 seconds. Victure M3-说明书-v01.5-20190621-转曲 - FCC Report victure m3 firmware update