Forgive me - it was because I wasn't right clicking a text box!
No problem, I'm glad we figured it out.
If I want to share snippets (centrally managed) with colleagues to also pick up, is this a paid version?
Yes, you would be interested in Text Blaze Business plan which has centrally managed snippets that are easily shareable with team members. You can read more about sharing in teams here: Text Blaze | Managing Teams and Organizations with Text Blaze Business
Can you have folders plus sub folders (and maybe even sub, sub folders)?
This is a pending feature request. Please feel free to add your use case to the current feature request: Nested folders for organisation