WARNING: Don't Upgrade

I only installed this plugin, a few days ago. I thought it was working great until I upgraded to the latest version. Now all events have reset to December 31, 1969 and won’t allow me to change them. So, not only is this calendar not working correctly, but I’m left with the option to redo them all, in another calendar plugin, or try a database hack.

Neither is exciting and certainly doesn’t make me want to buy their premium option(s).