Cleverific Order Editor currently doesn't have bulk editing capabilities.
There are a few bulk actions you can do with Shopify, you can find more information about this in this detailed article from Shopify's Help Center: Using bulk actions in your Shopify admin.
If you're unable to find a bulk action that would fit your needs, our best suggestion would be to work with a developer/Shopify Expert so they can write a one-off program to help you get this done.
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