Can now open shipspotting on windows 10 PC. However forum and log in is still blocked. Had an IT guy try to fix the problem, he believes there is an issue with the site, he could not resolve and believes Malwarebytes has detected a complex issue. My Mac still opens all, however very slow with warnings. I have tried my best to resolve without success so will not be posting on this site until resolved. In my case seems there may be a danger of corrupting other files.
Sorry about this, regards Tony.