iCal in infinite loop adding events

I have truthfully never had much use for Ical. I have found it's functionality, look and feel sadly lacking with other programs.

However, I now have ICAL in what appears to be an infinite loop of trying to add new events. I suspect it has something to do with a link to Google Calendar.

I have nothing of value on ICal and I want to start over from scratch.

How to do?

OS X LION 10.7.5

Macbook Pro. Early 2008