Hello!
Thank you for buying the component!
Do you want to show 2 columns in the content of a page or in a module? If this is in a page, you need to create a menu item and give the cards a width of about 45% (through the parameter option). If you want to do this in a module, you have to manually set the width of the cards in the stylesheets, to override the standard behavior (in the modules, the cards are taking a 100% width).
Let me know if that works for you.

Hi!
You need to go into
modules/mod_trombinoscopeextended/tmpl/default.php
and replace in
$style .= "width: 98%;";
the value '98' with the value you desire (less than 50).
Note that this property will be moved in the next release to the general stylesheet found in
themes/style.css.php