Having trouble using camera plugin in retro mode

[Perplexer]

I'm currently using 7.1.8.9200 in retro (IE) mode to access my Dahua surveillance camera live feed. When I first logged into this camera's web interface, the main window where the live feed should be was black and a message in the middle said "Please click here to download and install the plug-in." Clicking on this message downloaded a small plugin executable file directly from the camera itself (http://192.168.0.56:16856/webplugin.exe). After that plugin was installed, the live video started playing.

The issue I am having now is that I did a "Clear browsing data" today, and ever since then, I again keep getting the "Please click here to download and install the plug-in." when I log-in to the camera's web interface. The issue is, even if click and install it again (although I never uninstalled it), the live video doesn't play and it keeps showing that message. Somehow Maxthon doesn't want to see/recognize that plugin anymore or something.

Does anyone know what could be causing me problems or how to fix it?

Here's the link to the plugin:
https://mega.nz/file/DhJVUKxQ#cY1MKy-cjfcsnVc6gUCV8y42jH7WH1U0JdDL9bDkA-k

[Perplexer]

Update:

It may not have been the clearing of browsing data but Maxthon upgrade. I use portable versions and when I unpacked the 7.2.2.3400 over, the camera feed asked me for the plugin again. But a Windows reboot somehow solved that problem so now it works again now. Weird stuff.