After template installation and choosing it to the default template, click on the template's name in the template manager to set the parameters shown below.
The template uses a 12-column grid, so the Logo width, the Right column width, and the Left column width are the number of columns in the 12 column grid. You may have to play with these settings. Always check how the site looks when you decrease the browser window size, because the template is responsive, and the look of the site changes with the browser (or display) size.