Hi!
I upgraded to PRo and since then I have troubles with the width of the event Calendar. Any suggestions what I can do? Looks horrible: http://www.weibi.at/events/monat/
Sorry to hear about the troubles. Have you tried changing the Events Template setting in Settings > The Events Calendar > Template? That might help. Otherwise, this is likely something you will need to sort our with your theme either in the CSS or template code.