Nevermind, thanks. I’ve used a another widget. I did however have to go through EACH product individually and re-save ALL the product attributes to get them to show up in the filters. Very frustrating and I hope this doesn’t happen every time there is an update, especially as my product range grows from 30 odd products to hundreds. It certainly wasn’t ideal.
Also, the WooCommerce -> Status -> Tools and regenerate product lookup tables fix did NOT work for resetting all the attributes, they had to be done one by one.