[Plugin: The Events Calendar] Revert to Previous Version ~ How

On the upgrade link in our plug-in section it only said there was an “Upgrade available” ~ I selected the upgrade and it went through the process and reactivated the new version of the plugin. Only AFTER reactivation did it popup the message that this is a SIGNIFICANT upgrade and full backup should be done first. Hence, now all I get are blank pages when I go to our events section.

At the top of the plugin page it says, “Please make sure you have backed up before proceeding any further. You can easily revert to an old version if you want to backup first.”

I cannot find how to “easily revert to an old version” anywhere. Can someone please give instructions on how to do this? I assume our old event data is still intact.

Thanks

http://wordpress.org/extend/plugins/the-events-calendar/