For me it is working as usual.

Can you explain more what is not working? A screenshot may help.

In small resolution or on the smartphone, nothing happens when visitor click on the menu button. Since last upgrade. Before that everything working properly. I don't know how screenshot  could help, but here it is.

I just tested this on my smartphone after updating, with no issues. There might be some object that you have set to be invisible in mobile resolutions, but is still somehow blocking the hamburger menu from working properly. Maybe the new update has moved it slightly? Otherwise, I can't suggest what you can try.

No, no invisible objects. In preview mode everything working fine, but on the web not. And no clue what to do - my site is without menu useless on mobile phones. 

Mirjana, in WX5 at mobile resolution, please select the menu and click bring to front because it looks like it may be behind something as Wayne said.

It may also help us to help you if you could provide a link to your site.

It wasn't that, I forgot to upload some files, because I am an idiot, and that solved the problem.

But, after I upload x5engine*.* files, I got another problem. My captcha is not working any more, there is no picture, if I remove anti spam I still can't send the comment because of error. In both folders, imemail and captcha there is an errorlog: unexpected T_FUNCTION in .../res/x5engine.php on line 2015.

What I am doing wrong now?

Yeah, php version was the problem. I put it on 5.6 and my captcha is working fine now.

Thank you.