The designer app after installed from the website will not launch. If I install the app from Microsoft Store it will launch. I am trying to install from the website because I am having issues. I am not sure if there are two different versions (older / newer) because Home Assistant isn’t in the devices in the designer. I also tried adding Home Assistant and a few ONVIF cameras on my iphone - which I am able. However, if I backup the config and open it in the windows designer, the entries for Home Assistant and ONVIF don’t show up.
Did you install .NET 5? Choose the right version for your PC : https://dotnet.microsoft.com/download/dotnet/5.0