Mishutkadesign, it looks like your site is displaying the subcategories in the main column. However if 'category images' are not specified for each subcategory, only the text links will show in the main column. Click on the green 'e' circle to edit the subcategory information content and then near the bottom you can browse to find a 'Category image'.

No luck for my site displaying subcategories in the main column yet. After some trial and error I did enable the main categories to show on the main page (store homepage) but still no subcategories in main column when clicking on regular categories. CSS code is still very cryptic to me. I tried the above suggestion and one of the 3 CSS files did not have the 'require' code so I need to know how to find the default file to restore the code. If anyone knows the answer, thanks for the help.