Reached Limit of Feeds can Import

The All-in-One Event Calendar plugin (v3.0.1) reports “You have reached the limit of how many feeds you can import” which is stopping the updating of “Upcoming Events” on our website http://www.stfaith.com (it is linked to Google Calendar).  How can I remove events to get it working properly again as I cannot find any documentation on Timely’s website.

The page I need help with: [log in to see the link]