Duplicate Events from Sync with Outlook

Duplicate Events from Sync with Outlook

I synced my Outlook with Zoho Mail Suite Calendar and now I have 2 or 3 listings of each event in Zoho Calendar.  Reading through other posts there appears to be a way to search for events with an "*" and mass delete them, but when I put in an * and press enter nothing happens.  Any suggestions how I can clear my Zoho Calendar and start over?  Further complicating the problem is some of the events are not even for the right time, even though I have verified that Zoho, Outlook and Windows all are set for the same time zone.
 
Also, if I do clear the Zoho calendar, will my Outlook appointments be affected in any way the next time I sync? I don't want to have my Outlook entries deleted because I deleted my Zoho entries.  Please help. My staff must see my Zoho calendar so they can schedule my time and right now it is an absolute mess.