Clear all calendar data
I have succesfully installed EPC on a local server for our home intranet. The learning curve was somewhat steep  but I have a functioning calendar called from a couple of test web pages all doing what I expect and viewable on all of our computers. In the learning process I loaded a lot of test events to the calendar, many of these from fictitious users and groups which I have since deleted and can't resurrect. I can't now delete these entries (even as administrator), my question is, short of doing a full reinstall, can I clear the calendar before I start to load it with real data?
 The learning curve got too steep and I fell off when I got to Categories/Selections which I have failed to understand completely. In "Settings" in the Online Web Help I found "The settings include in-line help for each option so no additional instructions should be required to use this component." Can someone tell me how to find this information or alternatively point me to an "idiot's guide" on the topic?