How to remove Omerta Ransomware and decrypt .omerta files

Omerta is another ransomware-type virus which is originated from Scarab family. Developers have already released many similar viruses (Please Ransomware, Osk Ransomware, Crypto Ransomware, etc.), however, there is still no universal solution to this problem. Each new release causes a new wave of victims, and this one is no expectation.