Hello,

Thank you very much for choosing our theme and for contacting us.

We would recommend doing the following:

1. Prepare the clear WordPress installation on a staging site,
2. Install the theme and demo, and configure the site as you wish.
3. Export pages and products from your live site to the staging site, fix the content and then move all to your live site.

Most likely the content on your site was made by special previous theme widgets which is why the site is broken.

Best Regards