Do not use this app. It will not help you block spying on Windows 10.
Windows 10’s spy software bypasses the hosts file altogether. Evil, I know. So putting entries into the hosts file to redirect traffic to 127.0.0.1 does absolutely nothing.
You can block Windows 10 spying with a 3rd-party firewall or a firewall on the edge of your network.
I do not recommend a 3rd-party firewall installed on the same machine that you wish to block data exfiltration from as anything with admin access — including the Windows spy software — can then disable it or alter its rules. There is no technical way around this.
If you must use Windows 10, use it with a firewall that it has no direct access to. And if you do not care that your data is being stolen by Windows 10 — well, you are fucking stupid and probably should not use any OS.