Hi Esther,
First off, thanks for purchasing Event Aggregator! You’re one of the early adopters of this new product and I really appreciate your support. 🙂
The reason you are not seeing Event Aggregator in your downloads list is because it is not a download, but rather a service. In other words, it is already installed as long as The Events Calendar (4.3+) is installed.
To start using Event Aggregator, head to Events > Import and you will be able to start importing events from other sources, such as Facebook.
Let me know if you are not seeing the options to import for some reason and we can check that out together.
Thanks!
Geoff