Modifying Category Definitions

[RubbishNonsense]

I am new to Realm Works. I'm trying to modify some of the category definitions but even when I unprotected a category I can not delete any of the default snippets or delete unwanted categories. I find the same for tags. There are a lot of tags just not relevant for me and I'd like to de clutter things but cannot figure out how. Is this possible and if so how?

Thanks.