Hi Jeff,
Oh shoot, so sorry for the mixup here!
Event Aggregator actually comes bundled in The Events Calendar. In other words, neither Events Calendar PRO nor any other plugin is needed to use it.
You do need a license to unlock Event Aggregator’s features though. You can do that by purchasing the license, adding it to the Events > Settings > Licenses screen, then going to Events > Import to start importing events.
Does this help clarify things a bit? Would you like me to refund your Events Calendar PRO purchase? If so, let me know and I’d be happy to process that for you.
Cheers!
Geoff