I, too, have purchased cams but they have different firmware versions. clicking the Manual Check button returns "It is the latest version"
I have 2 cameras now, and a 3rd on the way:
Loryta IPC-T5442TM-AS-LED 3.6mm
Cam1: System Version 2.800.0000000.10.R, Build Date: 2019-11-18
Cam2...