I can't find the "edit option" or the "save option" referred to in your answer, Jobin. I followed these options:
To update the search criteria of one of your existing filters:
Step 3 shows the search results but not the search criteria. The criteria text box is empty. So, I can't proceed to Step 4. Entering text starts a new search and there is no "edit option". I have to delete the filter and start over to create the filter I want. Do I need to be an administrator or have some other privilege to edit my own filters?