I can't choose it in settings, in context menu, nowhere. Many menu don't have it. In windows 1809 all was OK. Idk, maybe in 1803 there is problem?
Yeah, I'm having the same issue in Windows 10. I'm not sure if it's a Sublime Text issue specifically, since I also had trouble assigning 7-zip as the default association for .gz files on Windows, but still.
other people reported the same thing - and that its a Windows 10 problem, not an ST problem