I upgraded from 8.26 to 8.30, and noticed right away that the detection zone setup did not work. Under Camera -> Detection, it said "unable to connect" on all 4 of my cameras (connected to rln8-410 NVR). I re-installed 8.26 and everything was fine. I just tried v8.31 and the detection zones still didn't work.

I also run the client on a secondary monitor on my PC. When I opened up settings in 8.30/8.31, the settings window pops up on the primary monitor. It doesn't do that with 8.26. Not a big deal but just thought I would mention it.

One final note, a changelog would be nice to see when a new version comes out.