Well one thing I noticed instantly; this update completely disables support for Edge or Chrome.
Still works in Firefox. Works in Firefox on Linux, even, which implies it would probably function just fine in Chrome and Edge if D-Link didn't deliberately disable them. Not by changing a feature, but literally by detecting other browsers and then presenting the following:
"The browser you are using may have difficulty receiving images and video. If you experience any issues viewing this page, we suggest using Internet Explorer, Mozilla Firefox, or Apple Safari."
The way this is worded, it implies they intend for you to be able to click through, but there is no such functionality in the page.
In fact, by using a user agent switcher to make Chrome lie and say it's IE, I get to the page just fine. Bad form, D-Link. By all means warn me that some features require another browser, but if I choose to continue to use Chrome that's my business, not yours. IE isn't even going to be a thing in a year or two except in Enterprise versions of Windows.