Hey Dawn,
I’m sorry to hear about these issues – it does indeed seem that you will need to manually install the latest versions of The Events Calendar and other Tribe plugins on your site (if you have any other ones, of course).
To do this, you’ll want to delete existing versions of Events Calendar Pro and The Events Calendar on your site – not just deactivate, but delete. You will not lose your event data by doing this (although backing up your site before installing ANY plugin or theme is always recommended, not just for The Events Calendar!).
Once those are deleted, head here for a copy of Events Calendar Pro and any other premium add-ons:
http://theeventscalendar.com/my-account/downloads
And here for The Events Calendar:
The Events Calendar
Install these freshly on your site, try entering the licenses again, and see what you find!
Thank you 🙂
George