How to remove Chekyshka Ransomware and decrypt .chekyshka files

Chekyshka Ransomware is a cryptovirus, encrypting user data, such as documents, audio, video, multimedia, and so on. Note that the name of the cryptovirus itself is the slang name for a small bottle of vodka. But now is not about that. The attackers are partly psychologists because they are well aware that no one wants to part with their private data and files, so many victims are willing to pay any money to return the files, but do not think to remove Chekyshka Ransomware and decrypt .chekyshka files.