I want to start over with my set-up on XBMC. I tried an install from hub wizard 1.0.7 zip, but now there are a ton of enabled add-ons that will take too long to uninstall. So I am hoping I can just delete the entire program , with any left over files, and start over with xbmchub repository only. Oddly, I can't find this answer on google. Is there a command that wipes it all clean? Thanks.
EDIT: In truth, I really wanted to uninstall so I could re install and start over. There were some bugs that xbmctalk forced onto the program and I wanted to get rid of xbmctalk's addons for good. It turns out xbmchub just uploaded a "fresh install hub wizard" which was under fusion zipfile. I ran that, and it got me back to brand new, fresh xbmc. Then I ran the newest v1.0.7 hub wizard, and that got me where I wanted to be. Thanks everyone for your help. A few of the answers below did not work for me, but I got to where I needed anyways.
EDIT(months later): I am on a new computer and new build. I was having issues with XBMC again after a fresh install. I found that the second answer to this question :
sudo apt-get purge xbmc xbmc-standalone was quickest and easiest way to completely erase XBMC.