Thanks for responding. Yes - I've tried that in the past. As you can see, Microsoft, in one of the recent updates, has removed the "always use this app" box - but, regardless, even when it was still available, it hijacks my setting at least weekly. I rarely get to this point, anyway. When I see those annoying Microsoft Edge icons, I curse up a storm, and then go to control panel and change the default.
Leaning toward switching to Apple, if they won't take the time to fix the automatic change of default apps to their recommended garbage.