Hey there,
First, I want to make it clear that with your renewed Facebook Importer license is a new, active Event Aggregator license. Note that you have two license keys for Event Aggregator in your account—only one is expired. You can view those license keys here → http://theeventscalendar.com/license-keys
As for how to proceed, I personally recommend deactivating and deleting Facebook Importer and iCal Importer, then activating Event Aggregator as per the instructions in that Knowledgebase article you linked to.
Event Aggregator has all of the features of both of those other Importer add-ons, plus extra features, so it is truly quite useful.
Please let me know if there are any other issues or questions I can try to help with, or if there are more specific details you’re curious about here.
Thanks!
George