Free version of the plugin doesn’t work correctly

Needed a calendar plugin that could accept iCal (.ics) feeds from a third party website and display the calendars on my site. Calendar only needs to display current month.
Plugin instead displays a messy overlap of the next 3 years. I’m not going to spend my time chasing support for something that doesn’t work correctly even in the slightest. Definitely not going to spend the money for a pro version.