I purchased Event Aggregator a couple of days ago. It has not yet worked. Initially it did recognize that I purchased the plugin and would allow me to try to import from Facebook and Google Calendar. However, none of those imports worked, and I received a note that recommended I change some timeout settings. I do not know how to do that.
Now Event Aggregator is grayed out. I have tried de-activating, deleting and re-installing, deactivating all my plug-ins, and switching to the Twenty Fourteen theme. No luck. (I have no reverted back to my original theme.)