HTML Executable 4.7.1 not recognising .html file extension?

In May 2016

Hello, team!
I have same problem but only on computer with Windows 7 x32 Enterprise Edition (IE 11). On other computers programm working well.
But on win7x32-e i see a new downloading window from IE and text “Cannot load index.html from heserver”.
I load for you screenshot but IE has russian interface

This could be related to security zones, check if you modified your Internet Explorer security settings.