hi free2app.ru,
We don’t have archive.php file. It will be loaded from index.php and we are using action hook on our theme. Go to theme folder ->inc -> structure -> content-extension.php on line no 101 to 197.
You can make code customization inside this function.
We recommended you not to change the code. If you wish to change it then while updating the new version all your customized code will be lost. So better make a child theme and then customize the code.
Thank you!