They never answer here and request that you fill out a help request form. That's somewhere on their website too, but good luck with that. I have been waiting a year asking for a fix for why those buttons appear all gray no matter if on or off in Windows 11. Windows just did an update (10/26/22) that apparently fixed it! Woo hoo! Anyway, I do not know of any hotkeys for channels. I've been using it for several years and just got used to using the mouse as I don't need to change those too often. Sorry if you do.