I am using JoomSef for SEF urls. After clicking the install button, it said that JoomSef was updated. Now, many of my URLs are messed up and some don't work. The variable ?limitstart=0 is also being appended to many of my URLs. Google is now indexing multiple URLs including URLs with category/subcategory paths pre-pended to them. How do I uninstall the SEO for Virtuemart extension and return my URLs back to what they were?