Alright, so I got some help from tech support and so far it has been good. So first of all, I had wrong version of HX edit (2.71). I updated it to 2.80, so that I got right drivers and software. After installing all software and drivers I turned Helix on and at same time pressing pedals 6 (MODE) and 12 (TAP/TUNER), that will make Helix go on update mode. After that I ran updates and now it is alive again!
Thank you tech support! <3