Well i fixed it I hope. I couldn't even go to preference in Opera, so I caouldn't disable extensions. I uninstalled everything and deleted all opera folders including those hidden one.
Wanted to save passwords but it came impossible, beacause if I copied old file wchich was keeping them, Opera started to crashing again. I think those old files were infected with something somehow.
Thanks for support anyway <3.
Btw if there is some way to uncrypt this file with password, so I could manually copy them, I would be greatfull for some tips (I m not sure if I remember all my passwords and sites where I was reggistred).