An improved version of the Release Notes is attached - pdf format with images.
Those release notes are for 4.1.60. Any idea what changed further in 4.1.61?
Anyway. I've updated to 4.1.61, and I too noticed that after update, in the web interface it appeared as if Hik-Connect was offline. Oddly, on my Hik-Connect iOS app it showed as online, and I could view live. Also, loggin in to hik-connect.com showed the device as online too! All event alarms from the device had stopped though. the fix for me was to modify the hik-connect URL by ticking the Custom option in the web UI, changing it to something else, clicking save, navigating away then back, then unticking 'Custom' again and click save again. Sure enough after navigating away and back once more, it showed as Online! All event notifications are now working again too!
Interestingly when I changed the URL to something else and saved, but before I fixed it back again, I checked one more on the app and on hik-connect.com and sure enough they both showed the NVR as offline. It's as though after the update, the NVR goes sort of half-offline? Still shows as online in some locations and can still be remotely accessed, but because IT thinks it's offline, it stops sending event notifications to "Surveillance Center"[sic]. Anyway, though I'd share that for others that thought they may have to downgrade again due to losing Hik-Connect.
One other new feature I noticed (other than it now seems to want to work without ActiveX in non-IE browsers, although it totally didn't show up any video image for me) is that now in the main "Picture" tab in the web UI you can now see images directly in the browser without having to download them by clicking on the misleadingly named "Live View" button next to each image in the list. Not sure what version this showed up in, since I don't look at that very often, mainly because of the lack of this very feature previously. Of course it's poorly implemented as you have to click "Live View" and then close each image before viewing the next. Nothing as outrageously sensible and a next/previous button to be found or, heaven forbid, actual thumbnail previews. Still, it's a start!