[Plugin: Multiple Category Selection Widget] Can't delete custom category

Hi there-

I’m using the All-in-One Calendar, which I love. The problem I’m running into with this widget is that it is pulling “events” as a category. I can find the category IDs of all the event categories, but I can’t seem to get the events category to disappear. Any thoughts on this?

https://www.ads-software.com/extend/plugins/multiple-category-selection-widget/