Calendar Gone

I read the threads talking about updating to 3.5 and the calendar disappearing. But, I didn’t install the plugin until after the update, and it’s been working fine. But as of today, the front end is completely gone. I tried the recommended manual fix, and it didn’t do anything. I really don’t want to have to find a new plugin, since this one is pretty much the best one I’ve seen.

http://wordpress.org/extend/plugins/ajax-event-calendar/