Hosts file editor created on WinForm.
You can add the new adress(es) on the left side and press Add to hosts.
On the start, program copy your hosts file content, and then by pressing on Reset Changes you can back to your version of Hosts.
By pressing Set Default Hosts you reset it to default Hosts file, like this(https://support.microsoft.com/en-us/help/972034/how-can-i-reset-the-hosts-file-back-to-the-default).