Bulk Editor App that allows individual product selection from filtered set

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We have just migrated a six hundred product site to Shopify, from Woocommerce, via Cart2Cart plugin. Only the top tier categories (collections) migrated. No Vendors, Types were not consistent. A considerable amount of filtering and restructuring is needed.
1) We downloaded a leading bulk edit app. We notice there are no checkboxes for selecting products to edit. Selecting individual products for bulk edits is imperative for us. We have not been able to find any apps that claim to be able to do this. Please advise if there is a way this, recommended apps etc.
2) We need a bulk editor to manage Cost of Goods fields. Any thoughts?  Thank you. - Jeff