Hey Josh,
Thanks for reaching out.
I am a bit confused here as we have never had a folder named “tribes” in any of our plugins.
With that in mind, I would recommend accessing your site’s wp-content/plugins folder directly over FTP and doing the following things:
1. Delete any existing copies of The Events Calendar and Events Calendar Pro. This will NOT delete any event data, but I would recommend backing up your site beforehand anyways just to be safe.
2. Download a fresh copy of The Events Calendar from here → http://wordpress.org/plugins/the-events-calendar
3. Install that fresh copy of The Events Calendar on your site and activate the plugin.
4. Any issues?
5. If not, then download a fresh copy of Events Calendar Pro from here → http://theeventscalendar.com/my-account/downloads
6. Install that fresh copy of Events Calendar Pro on your site and activate the plugin.
7. Do any issues persist?
Let me know what you find! 😀
Thanks,
George