Outdated copies of Woocommercetemplate files

Hi

I have tried several times to contact ThemeFarmer to see how I can sort this problem out but have never received a reply. I have the following message in my dashboard:

Your theme (NewShop eCommerce) contains outdated copies of some WooCommerce template files. These files may need updating to ensure they are compatible with the current version of WooCommerce. Suggestions to fix this:

Is there a way around this problem? (bearing in mind that I am not a techie so messing with html is something that I am unfamiliar with) or is it better to move to a new theme? i.e Twenty Twenty one.

If moving to a new theme is the best way how can I do it without losing anything from my current site?

Thank you.

The page I need help with: [log in to see the link]