Hey Heather,
Thanks for reaching out about this, I’m happy to help! 🙂
I believe the Events Aggregator plugin updates all event data as frequently as you set it to run imports (the lowest manual setting is 30 min). The good new is, because you’re a legacy user of the iCal Importer, there’s a license key in your dashboard that will allow you to test out Events Aggregator & its functionality before committing. 🙂
Simply insert the key in the plugin settings, and save. Then you’ll be able to import with the EA functionality by going to Events>Import.
Hope this helps, let me know if you have further questions or need clarification. 🙂
Best,
Shelby