@inaday – smithgt is right, you need to upgrade to premium version (which is free don’t get mistaken by the name). The upgrade process is very simple – go to calendar settings screen and there is a big green button that says upgrade to premium version, just click it and it will do the rest.
@smithgt – thank you
@borisj – sorry that you are having issues with our plugin – We decided to create a new premium version of the plugin for one simple reason – people started copying our plugin from wordpress, create a new plugin from the source code and then sell it. This plugin is free and it will stay free, we don’t want someone to just copy the work we did and sell it. When you upload a plugin to WordPress you lose any control over the source code, meaning that anyone can fork the source code make slight changes and then sell the plugin. The premium version is not obfuscated or encrypted in any way – only the license is different – if you want to sell the plugin, you need to get our permission first.
I am sorry that the plugin is not working for you, there is a lot of functionality in there and we are using a lot of resources that others plugin might be using too – which could result incompatibilities between two plugins. We are trying to use the very last version of any library we are adding to the plugin. I have to ask you about the following scenario – imagine that you have a wordpress blog with ai1ec installed, then you install wp-stats or jetpack and your admin panel is broken – would you say that wp-stats or jetpack broke your install? If you can fill a bug report on help.then.ly – we will try to fix the problems for your install and for other users experiencing this issue.