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When a new version of Kelvin is released, you can update without losing your work.
1

Duplicate your live theme

In Online Store → Themes, click ⋯ → Duplicate on your current theme. This copy is your safe fallback.
The Themes page in the Shopify admin

1 Import, to upload a new version · 2 your current theme, with ⋯ for Duplicate

2

Add the new version

Upload the new ZIP, or use Update if Shopify offers it in your theme library.
3

Copy your settings

Shopify carries settings across when it updates a theme for you. If you uploaded the ZIP yourself, set up the sections and theme settings again in the theme editor, using your duplicate as the reference. Your products, metafields, menus, pages and the PC Builder’s collections live in the admin and are not affected.
4

Preview, then publish

Check the home page in light and dark mode, a product with options, a collection with filters and compare boxes, the PC Builder, the cart and any promotions you run, on desktop and on a phone, then publish.
Code changes you or a developer made to theme files are not carried over by an update. Keep a note of them so they can be reapplied.