2)So that when & if he lodges a civil suit, he can document that he registered a criminal complaint as supporting evidence?
I think that depends on the rules regarding evidence for civil trials in Croatia. It's likely that they would allow it, since it can help with the determination of liability. But Evans would not want to refer to it unless there was a conviction. Stating in a civil trial that he tried to initiate criminal proceedings but was unsuccessful would hurt his case. An acquittal would be worse, and the defendants could use that to undermine his case (if they, for some reason, decided to travel to Croatia to defend themselves, lol). But the criminal case won't go anywhere. He filed it (assuming he really did file it) for the PR value.
Or for what he perceived to be the PR value, anyway. I think the 'legal action' angle is a bad idea that will blow up in his face.