What is the purpose of gwctlsrv.exe connecting to your domain, amazon and cloudfront? I note also multicast but see no need for that in my environment or if even the free version utilizes it.
I have for now blocked it. Will that cause any functional problems? (None noticed so far.) Nor am I concerned with a background “check for updates.”
In using the free version, if those connections serve a purpose to your revenue model, I’ll be OK with unblocking.