Date is not translated in my website

Hello.

I have a Lithuanian website and I use a plugin to create and show events. The plugin is called Very Simple Event List. Few days ago I installed some updates and since then when I create an event the date of the event on a website is printed in English not in Lithuanian. The default language of my website is Lithuanian. Do you know how I can get the date printed in English?

The page I need help with: [log in to see the link]