WordPress/Products/Discounts – Bulk Delete

I have about 50 products in my website and each one had the Enable Discounts ticked (Edit/Discounts) and a Dynamic Discount regime chosen. I wanted to remove all of the Dynamic Discounts so went into WooCommerce and deleted all the regimes. Trouble is that in the web browser the Products were still showing the relevant Dynamic Discount (even though they had all been deleted). It seems that I have to go into each Product, uncheck the Enable Discounts and then Update. Is there anyway to refresh the Products and uncheck Enable Discounts as a bulk action? It is a real pain to edit 50 products one at a time! Thanks