Unable to do Manual Update & Visual Composer Issues

Hi there,
I’ve been having issues with visual composer (unable to load on the front end, doesn’t work on the backend either). So I saw the Highend 3.2 Manual Update requirement. I have the new theme files saved, but even after shifting to a different theme, it will not let me delete the actual Highend theme. The error message it gives me is “Deletion failed: The requested theme does not exist.” The version of Highend that I have installed right now is 3.1.1. What steps do I need to take to move forward? Will having the new version of Highend installed fix the issues with visual composer or is that a separate issue altogether?

Thanks!