Each time I try to activate this plugin, I get a 500

Each time I try to activate this plugin, I get a 500 Internal Server Error. It's not a theme conflict, as I've switched to 2014 and the issue persists. Other calendars and plugins are installing and activating fine. Installed both through the WPMU Dev Dashboard, manually, and zip upload. Installs fine but throws 500 Internal Server Error upon activation. Very disappointed this I just paid $20 for something that I wasted 2 hours trying to just get to activate. Deactivated other plugins, not a conflict with them.