After that, go to Customize > click to button "Reset" at the top left of customize.
b/ Import demo data of any demo you want. It's way 2 in the guide here Way 2: Import Only customizer data
If you want to remove the demo posts/pages data only, you just need go to Posts > All Posts and Pages > All Pages > remove all posts/pages demo from demo data.
I imported 2 demo themes 'Fitness Blog' and 'Simple Blog' on the same website by mistake. How do I undo and start again?
Hi,
Do you have your old data on your sites?
If it's new site and you don't have any old data, you can use plugin Wordpress Reset to reset it to a fresh site.
If your site has old data, please do following steps:
a/ Install plugin Customize Reset
After that, go to Customize > click to button "Reset" at the top left of customize.
b/ Import demo data of any demo you want. It's way 2 in the guide here Way 2: Import Only customizer data
If you want to remove the demo posts/pages data only, you just need go to Posts > All Posts and Pages > All Pages > remove all posts/pages demo from demo data.
Best Regards,
PenciDesign