My WEB loads without the theme and formating when not logged in

Hello,

I am a novice to creating website. Today my web doesn′t load as how I see it when I am logged in as admin. I tried deactivating plugins, didn′t help. I thought it might me caused by starting using the Squirrly plugin yesterday, but it doesn′t help when I deactivate it. Also I thought that I am using an old version of a theme (Themify Ultra) because the new one is paid. But it would not just stop working now right?
Please can you help?

My site is https://www.vzmuzse.cz
The web should look like this (how I see it when logged):
https://www.dropbox.com/s/bczmp1k30coodi5/Screenshot.JPG?dl=0