Hi Andrius,
Thanks for reaching out!
There are some settings to change the styling under Appearance > Customize > The Events Calendar that come with the free version, and Pro adds features like recurring events, shortcodes, and additional views (map, week, and photo) but no additional styling features. We are not able to provide technical support here in the Pre-Sales forum, but the following articles might help you out:
Stylesheets and Page Templates
Basic Font and Color Changes with CSS
Themer’s Guide
We do offer full refunds within 30 days of purchase, so if you’d like to take Events Calendar Pro for a test run, feel free to do so! Please let me know if you have any additional questions.
Thanks,
Jennifer