I could resize with my fingers to zoom in on content. I don’t understand the sudden change.
Looking at a google cache of your page I see that you updated to version 1.1.5 from version 1.0.9 which was submitted many months ago.
Since that version, a line of code was added to actually make the theme responsive similar to other themes on wordpress.org
If you like to disable that behavior you have to remove that single line on header.php
Dashboard -> Appearance -> Editor then select the
Delete this line which is near the top
<meta name="viewport" content="width=device-width" />