Get the latest features while preserving all your customizations. Upload your current theme and download the upgraded version.
Follow these simple steps to export your current untamed theme, then upload it to the upgrade tool above.
Log into your Shopify admin and go to Online Store → Themes. You'll see your current live theme and any unpublished themes.
Next to your current theme, you'll see an Actions button or three dots (⋯). Click on it to open the actions menu.
From the actions menu, click on "Download theme files". Shopify will prepare your theme export and send you an email with a download link.