Thanks for pointing out the error in the Jobe documentation on setting the locale - fixed now. And thanks for offering to check out CodeRunner 3.3.0. However, without ssh access this is probably not practicable. I'm not sure what happens if you try to install a zip of a different branch of a plugin that's already installed. Safer not to try, I think. And nor can you (easily) uninstall CodeRunner.
You can be an early tester when I merge it into the master branch and push it out to github and to the Moodle plugin repository. Hopefully by the end of next week.