[Plugin: The Events Calendar] Changing calendar view gives 'page not found'

I had the events calendar on this blog and it worked. http:www.andrewgeorgiou.com
Then suddenly it didn’t work and when you click on the event it gave ‘page not found’.
I deleted the plugin and reinstalled it. Now the event shows and the calendar shows when you click on the event and then back to calendar BUT if you want to see all the events and click on view all events again you get ‘page not found’.
When you view the event and then click ‘back to events’ you get the calendar view. But then if you want to change the calendar view to list view again you get ‘page not found’.
Please can you help.