I confirm that it worked.

Being a little bit reluctant to believe what you said I've just given it a shot and called my internet provider and they confirmed that they changed the itnernet protocol from IPv4 to IPv6 in August. The new version of the protocol is something that's been there already for 5 years but not everyone was concerned. It turns out that they made a change just for me then. They've just changed it back to IPv4 and I am going to check DayZ now.

Yes, I am located in Poland and my provider is UPC. Why, then, does any other game works perfectly fine but not DayZ. DayZ worked perfectly fine a couple of months ago and suddenly it does not. Do you imply that UPC does not allow me to play just DayZ? :) What does this have to do with my internet provider?

Hello? Is there anybody out there? I need help.

This is what happens when I launch the game. I launched it just now (the first screen shot) and the resolution is very small and the language changed and all my key bindings are gone. I have spent so much time on it...

I today launched Arma and here's the resolution of the game. I don't know why it changes itself, it's so annoying. The ifrst image is after I launched Arma 3 and the second one is from after I quit the game and reopened it. Also the languge has changed from polish to english and all my key bindings are gone. This is unacceptable. I spent so much time on rebinding the keys and now they are gone.

And this.

This video explains what you did with the sway.

Like I said, I changed only language to polish and added key binding to Map (M) as #4 Mouse Button.