Changing Category Order

Try using the teccc_get_terms filter.

$terms = apply_filters( 'teccc_get_terms', $all_terms );

Ill test this just to make sure.

The above filter probably isn’t the best way.

The best way is to create a template override. https://github.com/afragen/the-events-calendar-category-colors/wiki/Setting-up-template-overrides