Question Editing existing Elementor template

[Francis Newman]

I created several pages and posts using a template I created, which is stored in my custom library.
I've updated it several times with various widgets and mods and the changes haven't percolated through to my existing pages/posts.
I've cleared the cache several times and tried different browsers, but the changes do not appear on existing pages/posts.

Is there something else I should be doing?
Looked at many videos and WP forums and can't find a solution.

Can you help please?
Thanks for you time.

Francis