@sgunhouse Thank you for advice. I tryied to reinstall all extensions and it looks that it helped.

I reinstalled Opera, because I made had to reinstall Windows. From that time every few hours all extensions are deleted. I put them back and few hour later Opera tells me that files were deleted.

First weird thing after I made clean installation of Opera was, that when I put my profile back, all extensions where gone when I launch Opera. I had to put it back manualy.
Now this is happening periodically.

Is there solution for this or did I do something wrong?

Thank you for answers.