3. Navigate to the next future date when the recurring event would occur. Select that day and choose Paste Event from the File menu. This will restore the event starting at that point and including all future instances. The unwanted past events will be gone. Success!
In a matter of minutes, I did this for about ten recurring events. When I was done, BusyCal had resumed its normal speed.
Note: While this worked great in BusyCal, it appears you cannot do the exact same thing in iCal. Apple’s calendar application does not include a Copy All option. You can develop a similar work-around, but it will require more steps.
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