Glad that everyone seems to have gotten things working here. I also wanted to post the manual workaround which will always work on any Windows machine and for either Rhino 6 or 7 (regardless of whether you have admin privileges, a username, etc.):
As you can see it’s a lot of steps so, if you can get things to run just by re-running the .bat file, then that’s probably preferred. But, with the manual process above, anyone will be able to get things to work.