If you don’t see an update notification, it could be due to code customizations conflicting with Shopify’s update system, or the theme was previously uploaded in a ZIP file. In this case, you can manually reinstall the theme and transfer the customization manually.
After uploading the new theme, transfer your settings, custom templates, and modifications to the new version.
Steps:
Go to your current theme, click Actions > Edit code.
Copy the following files from the old theme and paste them into the same folders in the new version:
All edited JSON files in the Templates folder.
The settings_data.json file in the Config folder.
Re-create custom templates (if any).
For custom templates, you'll need to create the JSON template in the new theme files since they won't exist there by default. More details here from Shopify on creating new templates in the theme.
Any apps that add code to your theme's files will need to be reinstalled. This can be an automatic or manual process depending on the app, so confirm with the app's developer whether removing and adding the app is enough to connect with the new version.
Find the app documentation in the App Store to follow the installation instructions.
If you're unfamiliar with this process, you can go to Apps > click View details to find the support email for that Shopify app.
