Reverting a World that Won't Load

In case anyone else runs into this:
Problem: The Wiki tab is only available after the World loads, but I had an error while saving and the world (http://lively-web.org/users/SeanDeNigris/firefighting/verbal_report.html) won't load, so I couldn't get to the tab…

Solution:
1. Go to another world and bring up the VersionViewer
2. Open an inspector on the viewer
3. Evalutate (in my example) - this.setPath("users/SeanDeNigris/firefighting/verbal_report.html")

Then you can visit and save a previous version...