AW2723DF, DDPM 2.0.0.72, does not recognize device

Hello!

I've been using the AW2723DF (27 inch) monitor with a lot of great joy for the past two years.
I've been using it combined with Dell Display Monitor software to switch from Display Port to HDMI input (from main PC screen to a console) instead of using the knob/button thing to switch. Recently, the software had an update and now I'm unable to connect the device to the software.

Monitor works fine though; display works as intended. It says there isn't a device connected, while it's working just fine. What is causing this?