MS Edge is a new browser, not a progression of Internet Explorer – at least according to people who ought to know. See
https://en.wikipedia.org/wiki/Microsoft_Edge (if you're one of those who don't believe anything on Wikipedia, check out the references).
As regards Works installation "threatening to modify Internet Explorer": it'd be helpful if you could tell us what the message actually said. For example, it seems that Internet Explorer may use files with .wps extension or that the .wps file extension may somehow become associated with IE; if all that the Works installation wants to do is to take that file association away from IE (as it must, since Works files have .wps extension), then let it. There shouldn't be a problem, especially if you don't use IE anyway, which many people would advise.