Installed/enabled NextDNS, but it ain't working

I've configured DNX over HTTPS per https://my.nextdns.io/xxxxxx/setup on Windows 11. I've also trying installing the app, which is enabled. DNS leak checkers laugh at my leakage. "The DNS settings for all Wi-Fi networks have been set. The settings below won't be used." Sounds ominous, but I've also set the settings for all Wi-Fi networks. https://my.nextdns.io/xxxxxx/setup on Windows 11 also says "This device is not using NextDNS" That's nice...the app is installed and enabled.