Hi - long time Channels user (and HDHomeRun user - I use the crappy HDHomeRun app on my Mac) I whipped this tool up today because I wanted to disable all the SD and DRM channels on my HDHomeRun at the source, and I didn't want to click each individual channel.
It detects your device, and then lets you click one button to disable all SD channels, all DRM channels, or re-enable all channels. It super rough, but I can post it somewhere if people would be interested in this.