Could you try to find C:\Windows\System32\drivers\etc\hosts ? This is a file without extension.
I have to be in C:\Windows\System32\drivers\etc for Listary to find this file.
Just tried this and it found hosts file instantly from the desktop.
Win7 x64 with Listary Pro 4.00.1167
Now it works ok, I don’t know what has changed since my last try.