Hi, jaxxnux. I’m sorry you’re encountering this bug. It’s a known issue that will be patched shortly.
Until then, please check out the “Useful Code Snippets” in the right-hand side bar. You should see one for “Recurring Events – Fix for Update Recurring Events Dialog”. That should get you back in business. Another alternative is to use the Tab and Enter keys to navigate, but the snippet will fix the problem entirely.
Also, I’m going to move this thread to the Events Calendar PRO forum. In the future, we’d appreciate if you would post troubleshooting questions there.
Thanks!